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Video game examples:
- Although not magic, Gunners in Monster Hunter have long-range attacks and greater versatility through the ammo system than their Blademaster counterparts. In exchange, they are limited to using armor that usually has only half the defense of the sets the close-combat fighters use.
- Averted in Demon's Souls and Dark Souls; nothing stops you from being a spellcaster wearing heavy armor, but in Demons Souls Armor Is Useless and in Dark Souls, concentrating on the two stats that make you an excellent spellcaster (Attunement for more spells lots and Intelligence or Faith for more powerful spells) tend to leave you with not enough stats to level your Endurance, which increases how much equipment you can wear without being slowed down. It is certainly not unheard of, for sure.
- Played a bit straighter in Dark Souls II as some armor will also penalize you for wearing it without sufficient Strength and have its physical defense increased depending on physical defense without armor (which is based on total of Strength, Dexterity, Vitality, and Endurance), giving mages less protection in comparison.
- Dragon Age: Origins has a Fatigue System, in which the heavier your armor is, the more expensive your skills are. As per the trope, Mages are particularly bad with this (and usually had to sacrifice stats to get the required strength). Averted with the Arcane Warrior sub-class, who actively embrace high fatigue in exchange for the ability to wear heavier armor and use spell-power to determine mundane weapon damage; several armorset bonuses have "reduced Fatigue" in them — some of the bonuses are big enough that the Arcane Warrior ends up with more mana than a regular mage wearing robes. Later games in the Dragon Age series simply limited each class to one armor type, though the disparity in armor values is smaller than you might expect.
- The .hack R1 Games have 3 levels of armour, with Wavemasters only being able to wear the lightest version.
- Fortune Summoners justifies this In-Universe. The main character, Arche, is the only one who can wear metal armour and use a sword because she doesn't rely on magic (because she can't cast it until the end, where she becomes able to do a Fusion Dance with an air elemental), which large metal objects interfere with.
- Final Fantasy:
- Final Fantasy I set the example that other games in the series have used, subverted, or otherwise zig-zagged on. The black mage and white mage are both lacking in terms of what armor they can equip, though things improve (somewhat) later on with a few decent pieces of equipment they can equip. At the same time, the red mage averts this trope, having decent armor availability compared to the other two casters. The Knight also learns some white magic despite being the heavy armor user, but its not his strong suit.
- Subverted in Dissidia: Final Fantasy, as Golbez wears full black armor as in his original game, but is a fully magic fighter. Gilgamesh then lampshades this trope by calling out to him that if he's a wizard, he should dress the part. Likewise, Exdeath is much more the Evil Sorcerer than anything else, and also wears full plate. Possibly played with with The Emperor: While his "canon" costume is a suit of golden armor, it's possible that it's only for show, a trick to make him look more imposing, as he's a Squishy Wizard whose alternate robe outfits reveal him to be quite thin.
- Final Fantasy Record Keeper turns Exdeath into an inversion. He is capable of equipping heavy armor and helmets as well as lighter outfits and bracers. But he cannot equip a hat, the armor type that is tailored to magicians and grants the highest magic and resistance boosts.
- The games with a Job System avert it insofar as you can mix and match the job abilities, but the heavy armor wearing jobs usually don't have the MP or stats to cast a lot of spells while the caster jobs are limited to robes and light armor.
- Played with in Dragon Quest IX: magic classes like the Mage and Sage can wear some medium armor without penalty, but they rely on the stats bonuses only found is magical garments for decent spellcasting strength. So if they aren't Squishy Wizards they'll be mediocre spellcasters.
- In Diablo and Diablo II, this happens in a roundabout way. A character's ability to wear a piece of armour (aside from level and any specific class restrictions on an item) more often than not depends on how many stat points are in STR. The result is that the 'pure' mage classes (wizards in the first game, necromancers and sorceresses in the second) can't wear the heaviest armour because the player has likely put most of their stat points into INT. In other words, they can't wear the armour because they're squishy, and they're squishy because they train their minds more than their bodies. Additionally in Diablo the Sorcerer had the lowest maximum STR, placing another cap on what armors they could equip.
- Downplayed in RuneScape. Armor imposes a damage penalty on offensive magics, moreso with armors made of metal, to the point where a lot of spells are useless if you're wearing full plate armor. However, the penalty only applies to Hit Point damage: spells inflicting Standard Status Effects work fine.
- This was completely eliminated for a while following the Evolution of Combat update. The penalties for using mismatched weapons and armor were eliminated so it was reasonable to see a fighter running around in magic robes, or a mage in plate armor. Later changes reintroduced penalties for mismatched weapons and armor.
- In World of Warcraft Mages and Warlocks and Priests can only wear cloth armor. Although it doesn't seem to be much of a problem for others - druids and monks can cast spells wearing leather armor, shamans in mail, and paladins in plate. These were all conceived as "hybrid" classes that can fill other roles, while the three restricted to cloth are casters regardless of their specialization. Funnily in earlier expansions it wasn't uncommon to find the other classes wearing cloth anyway, due to a lack of good caster armor of other types.
- In Rift: Mages can only wear cloth armor. Justified as follows:
"The art of weaving magic does not favor heavy armors that distract the senses and restrict movement."
- Guild Wars: Pure spellcaster classes (Elementalist, Mesmer, Monk, Necromancer) are restricted to lower armor ratings than fighter type classes.
- Guild Wars 2: Scholar type professions (Elementalist, Mesmer, Necromancer) can only wear light armor.
- Very early in Ultima Online there was no such restriction in place. This was changed with an update because it created serious balance issues.
- In EverQuest and EverQuest II, as well as the spinoff Champions of Norrath, all the mage classes are restricted to wearing cloth armor, though EQ2's appearance armor slots have allowed for them to at least appear to be wearing full platemail while wielding giant flaming swords.
- In Star Wars: The Old Republic, the more Force-oriented Jedi/Sith classes (Consulars and Inquisitors) were only proficient with light armor at first. The game has since added adaptive armor, which once equipped becomes functionally equivalent to the heaviest armor the character can normally wear, which can allow them to wear armor that looks heavier (though a lot of players tend to go the opposite direction).
- Played with in Trickster Online. Every character can wield any type of equipment provided they're the appropriate level. However, the thief class analogues can't wield guns and shields at the same time, and it's only Guns that are mutually exclusive with shields (which are your main source of defense in the game). Similarly, magic-reliant classes have to choose between hats that can be refined for DP (raw physical defense) and hats that can be compounded for MA (raw magical attack).
- Star Trek Online has a starship variant of this in space combat, with the "wizard" class being the science vessel family of ships (essentially anything with a Commander Science bridge officer slot). Typically a science vessel mounts fewer weapons and has a weaker hull than a cruiser or escort, though they often have better Deflector Shields. One of the better examples is the popular Nova-class, capable of tremendous Technobabble but with little staying power in a slugging match. It gets played with considerably, though, since the game typically lumps carriers in with science vessels, and escorts often have even weaker hull and shield values than science vessels, at least in theory (equipment makes a big difference).
Multiplayer Online Battle Arenas
- In League of Legends, you can build a magic-damage mage with as much armor as you want, but that means you've wasted your finite gold on items that don't boost the damage you do. Mages' abilities scale in a way that makes it more reasonable to build them into glass cannons.
- Played with in Bungie's Myth universe. Mages have no restriction against wearing armor. They generally still don't since they often have magical protection which would render armor redundant, but some wear armor anyway. For example, Balor The Leveler was an archmage who went full Tin Tyrant for no other reason than it made him look more intimidating. Likewise, Alric would eventually wear a custom suit of Heron Guard armor to signify his possession of the Ibis Crown and ascension to Emperor of Cath Bruig.
- Averted in Defender's Quest with the ice mages, one of the two classes that wear heavy armor.
- Varies from caster to caster in Warcraft III. Paladins are heavily armored Magic Knights, while Druids of the Claw can turn into bears (with no armor but their fur and skin).
- This applies to some degree in many, many Roguelikes, for balance purposes.
- Spells in NetHack are far more likely to fail if you wear metal armor, for no adequately explained reason. Wizards zig-zag the trope: they generally wear metal armor early in the game because they're so squishy without it, and they don't know many spells yet anyway. Eventually dragon-scale mail, divine protection, and armor enchantments make metal armor obsolete, allowing high-level wizards to become Magic Knights.
- Dungeon Crawl, similarly, has armor increase spellcasting failure proportional to how much it hinders your movement. It's more pronounced on high level spells so a character with mostly low or mid level spells can often get away with medium armor, but a conjurer or summoner will usually avoid anything heavier than leather armor.
- Applied in Tales of Maj'Eyal in two different ways. Armor requires a certain amount of strength to equip, which a mage would have to spend instead of increasing their magic stat. There is also the fatigue system, which increases the cost of a skill by a percentage equal to the total fatigue rating of all armor equipped. This applies not only to stamina-based physical skills but doubles the additional cost for spells and psionics, making it very unlikely that a mage or psychic will wear anything heavier than leather armor or equip a shield.
- This is used in the Fire Emblem series, with magicians generally drawn in robes and having a low physical defence score. The sword cuts both ways, though: armored units are frequently just as bad at fending off magical attacks.
- Likewise, Shining Force follows this trope to a tee, with the exception of Arthur.
- Downplayed in the Disgaea series. Apart from weapons there aren't any restrictions on what equipment characters can equip, so it's very possible to equip mages with armors without any hindrance to damage output. However, the effectiveness of equipment is determined by the class's Aptitudes. Mages generally have low DEF Aptitudes, and thus get less DEF bonus from equipment. Of course it doesn't take long until even the highest defensive stat boosts are useless.
- In Knights of the Old Republic wearing any armor other than Jedi robes means that certain Force powers are unusable. The sequel adds a few types of armor specifically designed for Force users that do not have this effect.
- Downplayed in Pillars of Eternity, there's nothing stopping magic-users from wearing heavy armor, but heavier armor applies a cooldown penalty to the wearer (which affects magic-users disproportionately). Also, in the lore mages have taken to wearing bulletproof plate armor to help fend off the setting's primitive wheel-lock firearms, which are an Armor-Piercing Attack against magical defenses. (In fact, the church of the War Goddess Magran believes gunpowder was a gift from her, meant to level the playing field between Muggles and mages.)
- The Elder Scrolls:
- Pure mage NPCs typically don't wear armor, as how effective it is depends mostly on your skill level with that armor class, and NPCs typically don't have many skill points outside of their class skills. However there's nothing that actually stops them from equipping itnote , and the series has always had several types of Magic Knights on up to the heavy armor-wearing Battlemage.
- In theory, The Elder Scrolls III: Morrowind gives an incentive for mages to not wear armor by having the Unarmored skill, which increases your armor rating while not wearing armour, keyed to the magic specialisation (meaning that for a magic-focused character, absent specific skill specialisations it will increase faster than the armour skills, and absent skill specialisations and racial boni it will start out higher). In practice, without the unofficial Code Patch the game is bugged and thinks your armor rating is zero no matter what your skill unless you wear at least one piece of armor.
- The Elder Scrolls IV: Oblivion imposes a penalty on any spells cast while wearing armor, based on how skilled your character is at wearing that type of armor. Spells cast while wearing an armor your character is completely untrained in will have only 80% effectiveness, while a master of armor will cast at 95% effectiveness.
- Skyrim changes it up a little. Spells work just as well with armor as without, but the Alteration skill tree has a perk, "Mage Armor," that adds a multiplier to protective spells like Stoneflesh if the caster is unarmored.
- Strangely, the magic restrictions don't seem to apply to enchantments on the armor. In Morrowind, heavier armors allow for stronger enchantments (meaning that ironically, the optimal setup for a mage is full Daedric), while in Oblivion and Skyrim, armor type doesn't affect your enchantments at all. You would think with this trope in effect, it would be the other way around, especially since Daedric armor is technically enchanted already.
- In the Dragon Age series, magic and heavy armor don't mix for two reasons: heavier armor sets tend to have high requirements on Strength, which the mages generally don't develop, and also make casting spells more expensive, effectively reducing their mana pools. It is, however, possible to subvert this in Dragon Age: Origins if you manage to unlock the Arcane Warrior mage specialization, which checks Strength requisites against your Magic score instead. Further, many armor sets offer fatigue discounts when the full set is worn—applied to a Mage, this means they have a much larger pool of mana to work with as an Arcane Warrior than while wearing regular robes.
- In Drakensang (which is based on The Dark Eye, below), magic users are able to equip anything; however they are completely blocked from casting spells if they wear only one single piece of metal armor (with exceptions).
- There is no in-game explanation for why, but spellcasting classes in Might and Magic VI to IX tend to have worse armor skills than their more might-focused counterparts, either in simply not getting the heavier armor skills, or in not being able to upgrade the skill as much. Clerical spellcasters tend to be slightly better at this than Elemental-focused spellcasters (for instance, Clerics being able to wear chain when Sorcerors are limited to Leather — although sorcerors do get to wear leather armor with no penalty, so by the standards of this trope they get off lightly).
- In the original Mass Effect the greater the character's focus on tech or biotics, the less heavy the armour they could equip. Tali, Kaidan, Liara, and Adept, Sentinel, and Engineer Shepard could only wear light armour, and Liara and Sentinels don't even have any options for improving their competence with it. Garrus and Infiltrator or Vanguard Shepard start out with only light armour available but can invest skill points to unlock medium armour. Wrex, Ashley and Soldier Shepard, the most combat-focused characters, have access to medium armour from the start and can unlock heavy armour, though Wrex averts this since he actually is a biotic character (presumably his krogan physiology lets him cheat). The later games in the series removed armour classes, though still adhering to the principle, with more power-focused classes and characters usually having less health and shields, as well as fewer and weaker weapon choices.
- While armor classes have been removed, Shepard can swap out the standard N7 armor's individual components for alternates; each of these has a different effect. A Soldier will tend to go for armor pieces that increase maximum health/shields and weapon damage. Classes such as Adepts and Engineers that are reliant on powers for damage are more likely to equip components that decrease recharge times and increase power damage. Multiplayer in Mass Effect 3 uses a similar system, in that the items that increase power damage, recharge times, and total shield power all use the armour slot - so characters based off of power combos or sheer damage will have to make a trade-off when it comes to powers, weapons, and Hit Points.
- In the Avernum/Exile series, there are two kinds of Functional Magic: Mage Spells and Priest Spells, and although they're nearly identical in implementation, they're treated as separate kinds of phenomena in-universe. Only the former is called "magic" (the latter doesn't have a distinct in-universe name, but is sometimes referred to as variations on "holy rituals"), and only practitioners of the former are restricted from wearing armor without an appropriate Trait, apparently because only the former uses Magical Gestures, while the latter just requires the caster to stand and pray.
- Downplayed in Avencast: Rise of the Mage - mages wear armor in battles, but their combat style is focused on fast moving and quick magic gestures, so they use light armor, which weight won't interfere in the process or tire them.
- Betrayal at Krondor averts this, letting you put the same armor on your spellcasters as you do on your warriors. The sequel Return to Krondor plays it straight, however, and your casters are not going to be wearing much of the heavy stuff.
- Baldur's Gate: Mages are not allowed to wear armor. Dual-classed mages can wear any armor allowed by their second class, but cannot cast spells until removing it. Averted with clerics and druids, who are allowed armor with no penalties to spellcasting.
Wide Open Sandbox
- While Minecraft only has magic in the form of potion crafting and enchanting equipment, it still has an element of this trope. When enchanting items, the material a tool, weapon, or piece of armor is made of has an effect on what effects are available at what levels. Wooden tools and leather armor have more "enchantability" than iron equipment or chainmail, and diamond tools/armor likewise is even less receptive to enchantments, while gold equipment is the most enchantable. The only exception to this pattern is stone, as stone tools (just above wood in terms of durability and utility) have the lowest bonus to enchantment.
Non-video game examples:
- In The Stormlight Archive Szeth mentions that he can't wear Shardplate because it would prevent him using his Lashings. The Knights Radiant must have known a way around this, since they've been seen to use both Lashings and Plate at the same time.
- In The Death Gate Cycle, it's explicitly stated that no Sartan or Patryn (both Witch Species) would ever voluntarily don armor. Since the Sartan require elaborate gestures and even dances to invoke their rune magic, heavy armor would presumably interfere with their ability to use their powers. The Patryns, on the other hand, tattoo the rune directly onto their bodies, which includes protective wards rendering armor superfluous (since any attack that could get through the wards would barely be slowed down by mundane armor).
- As with many tropes common in Role-Playing Games, Dungeons & Dragons is the Trope Codifier, making this trope Older Than the NES.
- Basic D&D. In the Holmes (1977), Moldvay (1981) and Mentzer (1983) Basic sets and the Rules Cyclopedia (1991), magic users could not wear armor.
- In 1st and 2nd Edition Advanced D&D, magic users/wizards were simply forbidden to wear armor under the standard rules. There were exceptions made in later supplements, such as 2nd Edition kits which allowed a wizard with that kit to wear armor.
- In 3.X Edition arcane casters can wear armor if they take a proficiency feat or multiclass to Fighter or the equivalent, but if they do they risk a percentage chance that the spell will fail to cast, justified as the armor interfering with the gestures involved in spellcasting. Add to it, that's one fewer feat or character level they can spend on improving their spellcasting. Bards and the add-on classes warmage and warlock can wear light armor without hitting this restriction, and can take a feat, "Armored Caster", to be able to wear medium armor without risking spell failure. Also, armor made from mithral weighs less and reduces the spell failure chance by 10%. Of course, a wizard with skill in the schools of transmutation and abjuration doesn't necessarily need armor since they can protect themselves quite well with their spells. Also, not all spells require gestures (and many can be modified to not require it) getting around the spell failure chance.
- Also from 3.X Edition, druids are only allowed to wear armor (and other equipment) made from "natural" materials (wood, hides, stone, etc.) or else their class features are unusable. Assuming default materials, this restricts druids to wearing light armor or the weakest type of medium armor, but the Dungeon Master's Guide and other add-on books added other esoteric materials (e.g. dragonhide in the DMG) that are classified as natural and can be forged into heavier armors.
- In 4th Edition wizards have the worst armor proficiency, but they can take feats to gain proficiency in heavier armor types, or another feat which essentially gives them protection as strong as leather armor while wearing mage robes. However, because of the way AC works in 4th edition, mages are only marginally more vulnerable to physical attacks to begin with.
- In 5th Edition, characters cannot cast spells while wearing armour they're not proficient in, and gaining proficiencies is more difficult than before. Your spellcasting ability and your armour proficiencies tend to be opposite proportional; wizards and sorcerers have no armour proficiencies but also have easy access to the Mage Armour spell, which is about as strong as medium armour, and sorcerers of the Draconic bloodline have draconic toughness, bypassing that need. The Favored Soul variant for the sorcerer gets medium armor proficiency, while the mountain dwarf subrace has a racial proficiency in medium armor.
- Averted in all editions by clerics, who can cast their spells in the heaviest plate mail with no problems and no chance of armor-induced random failure. This is one of the primary practical differences between "arcane" and "divine" magic in the game (the main other one is access to healing spells).
- The alternate magic system from Spheres of Power averts this by default, but you can use the Somatic Casting drawback to enforce it.
- The Dragonlance setting has unusual rules for magic: it's technically divine, as it all flows through one of the three Gods of magic. Those same Gods explicitly forbid the wearing of armor.
- In The Dark Eye, forged metal interferes with the flow of magical energies (with some rare exceptions) in such a way that it makes casting spells more difficult and prohibits the regeneration of Mana if a significant amount is worn close to a magic user's body. While magic users can wear anything not made out of metal (e.g. heavy leather), this is frowned upon by the Magician's Guilds as not befitting a wizard's standing, further restricting proper certified wizards to fancy robes and such.
- In fact, it is outright outlawed for wizards to bear arms or armor in most places. The mages from the battlemage academy are explicitly excempt from this, as they are also commissioned military officers.
- The Fantasy Trip penalized wizards for wearing armor with a twofold justification. Ferrous metals interfere with magic, and armor itself interferes with spells' somatic components.
- Armour in The Witcher: Game of Imagination by default restricts movement, making the complicated gestures needed for sorcery difficult — doubly so if you're untrained in wearing it. Witchers, by contrast, use rudimentary signs created specifically to overcome this problem.
- It is also worth nothing a set of armoured gloves gives bigger penalty than a breast-plate, following the game logic of movement restriction.
- Later expansion gave players a feat considerably decreasing penalties for casting in armour. And with sufficiently high skills, magic users can simply ignore the penalty most of the time.
- Averted in Mage: The Awakening. A mage could wear a suit of body armor, enhance the armor's effectiveness by enchanting it with various spells (largely Matter and Fate), and shroud themself in a shielding spell to top it off. The Squishy Wizard factor of Mage is due to magi lacking the inherent immunities or self-healing abilities other supernatural types possess, but they are good at avoiding harm in the first place.
- In the Scarred Lands setting, one of the quirks of magic is that arcane spellcasters release a certain amount of heat whenever they use magic. This prevents them from wearing armor, and also explains why most prefer to wear loose fitting clothing.
- Averted by Warhammer 40,000's Space Marine Librarians, who wear Power Armor with no more trouble that their non-psychic brethren (the fact that the transformation into a Space Marine makes them all seven feet tall and slightly bulletproof doesn't hurt). Taken even further with the Grey Knights, every last one of which is a Space Marine with psyker powers. Played straight with Imperial psykers, who mostly wear robes, though some can put on the heaviest armor the Guard has to offer (known as "T-shirts" by the fandom...).
- It does more then just allow magic, it makes them better at it by helping stabilize the innately chaotic nature of psychic powers. But like most 40k technology, it's rare and nearly/impossible to mass produce so only the most elite units are given access to the technology because they can't afford to waste it on every psyker, especially non-SM psykers who are even more likely to become warp-possessed and cause them to lose access to that gear.
- Only War makes the aversion rather clear; characters always get their regimental kit regardless of said character's classnote . Said regimental kit can include carapace armour, which is the toughest stuff you can get short of actual power armour.
- It's common in Warhammer for wizards to not have access to armour (it interferes with their ability to tap into the Winds of Magic), but there are more than a few Magic Knight-type characters who avert the trope (in particular, Ogres and Blood Dragon Vampires). Some armour-type magic items specifically include an exemption allowing wizards to wear them.
- Actually Ogre wizards were never meant to wear armour, and an interview with the writer of the current Ogre book reveals that it was only an oversight in giving them access to Ironfists (a type of fist-spike gauntlet) that let them technically qualify for magic armour (the rule being that if the wizard is permitted to wear regular armour in the army list entry, they are allowed magic armour too). The longest-standing and most prominent exception to the no-armour-for-wizards rule would have to be Chaos Sorcerers, whose Chaos Armour is so heavily saturated in magic that it is no impediment. Other exceptions include High Elf Loremasters, the Witch King of Naggaroth, Ikit Claw and Tomb King Settra.
- Averted in Fantasy Craft where armor has no effect on spell casting and any class can wear any armor meaning that you can have a mage in full plate.
- Zig-zagged in Legend of the Five Rings. Nothing mechanical prevents shugenja from wearing armor; in fact, pretty much any samurai can wear any kind of armor physically, as long as they're willing to put up with the penalties (save for the Hida, whose only heavy armor penalty is to stealth). However, most shugenja choose not to due to cultural constraints. Wearing armor in civilized lands is an insult to those who tend the lands (you're basically saying that they can't protect you) unless you are actively in battle or are given special dispensation. Being in battle does allow shugenja the theoretical opportunity to wear armor, but the choice to do so depends on the situation in which the shugenja is involved, and their personal preferences.
- Inverted in Exalted. The act of shaping a spell during combat leaves a Sorcerer almost completely defenseless until the spell is complete and puts a giant "please hit me" sign on the Sorcerer. Luckily, armor doesn't hinder spellcasting and a smart Sorcerer will wear armor. It's the Martial Artists who fall victim to this trope as many styles prohibit wearing armor.
- Averted to some extent in Shadowrun: armor can be worn regardless of class and they have specific names that boost the stats for the character without suffering any penalty. The only thing that hinders characters is cyberware; a character has a certain amount of Essence points to start off with, and Essence points also determine the ability to cast spells. Installing cyberware reduces a character's Essence points, which reduces the ability to cast spells and also increases the cooling time to cast them. The installment of cyberware also depends on the quality of the ware; regular cyberware is typically the cheapest but costs a lot of Essence points to install, while Alpha, Beta, and Deltaware tend to be far more expensive but drains less Essence points. Essence points may not go below 1 or else the character dies. Players who focus on spellcasting abilities and/or utilize the Adept class (essentially a monk augmented by magic) tend to avoid installing cyberware except probably the usual Datajack if they wish to hack into the Matrix.
- Downplayed in Anima: Beyond Fantasy. While carrying armor does not interfere with your ability to cast spells, the points for the ability required to use armor are more expensive for sorcerers.
- Played with in Rifts: high-tech armour is carried by wizards, but unless absolutely neccessary, they will not wear a whole suit all at once, as wearing more than a certain percentage of it at once will prevent spellcasting through it. Metal armour carries the same penalty. Any Magic Knights, therefore, are usually wearing armour made of natural materials which are often mega-damage armour (smeg knows there's enough such organisms in the setting, such as magic trees, drakes etc.) although these have penalties such as increased mass, and the fact that they aren't air-conditioned or NBC sealed. Magic stone or crystal armours do exist, as do magitek powered armour, and magical metal armour, but these aren't exactly the kind of thing you can get anytime you find a place to shop, they are rare and expensive.
- Completely averted in GURPS: there are no restrictions on mages wearing armor, or on weapon use or anything else. In the first and second editions, magic was powered by a character's Fatigue points, which meant that the mage was often the healthiest character in the adventuring party!
- Although shielding was never really covered in Ben 10, the specially-designed Hazmat suits Gwen wore interfered with her spellcasting when she was wearing it.