It either damages both you and the enemy, or comes with both positive and negative effects
This trope refers to any kind of special power, item or unit that does one of the following:
- Always hits both you and the enemy.
- Has both a positive and a negative effect.
ExamplesAnime and Manga
- The Irregular at Magic High School: Tatsuya takes out his designated opponent in tiebreaking mock-combat match during culmination of the Inter-High School Competition, by getting near, then snapping his fingers real close to the opponent's head. Amplifying the sound by magic. The guy is out cold, but since Tatsuya is litterally at arms reach from the epicenter, he isn't left unscathed and has to lip-read his teammates' post-victory banter, among other things.
- The Xavier Academy student Gentle is capable of boosting his strength and muscle mass, but every time he uses this power, it causes him to suffer seizures, and if he keeps using the power, it will eventually kill him.
- One of the future Shadowpact members, Miss Poltergeist, has telekinetic powers that have the side effect of making her constantly angry.
- In 24, during the day 4, the Corrupt Corporate Executives whom CTU were investigating have set off an EMP bomb, despite the fact that it would cripple themselves electronically. They concluded that it would be better than going to prison.
- In Anita Blake Vampire Hunter, the vampire ability called 'the arduer', a power which allows a vampire to inspire love or lust in themselves and others, is often called a 'double edged sword' by Anita, because you can only inspire as much love in others as you are willing to love in return, (so making someone love you will make you love them just as much). About it she often comments that "you can only cut as much as you're willing to be cut, and apparently I'm willing to be cut deep."
- The "Chainsword" in Angband is very sharp, can cause bleeding wounds, has a bonus to damage on top of a hefty damage roll, allows you to see invisible creatures and slays orcs and trolls. On the downside it's horrendously inaccurate unless you use a ridculous number of "enchant weapon to hit" scrolls to correct the issue and is so noisy it aggravates and attracts nearby creatures. Some versions also penalize some of your stats.
- In Arc Rise Fantasia, the Anti-Magic Arm Force and Status Buff can be this, as while you're protected from any Magic spells from the enemy, you also can't heal yourself. Also the Anti-Force Arm Force, which can cancel out any Boosted or Supreme Magic Arm Forces, even if it's from an ally who's trying to heal you or give a Status Buff.
- BlazBlue: Ragna has a Super Mode named Blood Kain, which improves his Life Drain ability, but also slowly drains his health while active. It's no longer the case in the third game where it is improved to not drain his health anymore.
- In the third game, part of the Burst/Overdrive mechanic has this: Break Burst and Overdrive runs off the same gauge. Activating Overdrive means you can't use a Break Burst to escape from your opponent's combo until the gauge refills to full, while using Break Burst means you can't use Overdrive until the gauge refills to full.
- Dawn of War: Chaos Rising has a corruption meter which varies mostly depending on your wargear. Most Chaos-tainted wargear has much better stats at the cost of increasing corruption, while redeeming wargear tends to have negative effects like a negative armor rating.
- The Elder Scrolls IV: Oblivion:
- Scales of Pitiless Justice are a reward from one of the Dark Brotherhood quests. As long as they are in your inventory, they give you +2 to Strength, Agility, and Intelligence, but also -2 to Personality.
- The Shivering Isles expansion adds a Cursed variety of randomly dropped equipment. Items of this variety come with some negative effect in addition to the positive ones.
- In Final Fantasy Tactics A2, Scholar spells hit everyone, both allies and enemies. This can be turned into a Game-Breaker, though, by equipping allies with armors that absorb specific elements and having the Scholars cast spells of the same element, thus healing allies and damaging enemies at the same time.
- The Spirit Precipice in Kingdom of Loathing. Any time it strikes a critical hit, a bolt of evil energy arcs out of the sword and damages the wielder.
- Mega Man Battle Network: The Geddon series of chips do this. Geddon 1 cracks all of panels in the battle area, including your side, so when you walk off a cracked panel it'll leave a hole you cannot step on, potentially getting you trapped until the panel regenerates; the same applies to the enemies. Geddon 2 outright turns all empty panels into holes, instantly trapping both you and the enemies. Geddon 3, meanwhile, turns all panels into "swamp" panels that deals Damage Over Time to both you and enemies. Note that you can actually protect yourself against all of them by equipping the Floatshoes/Airshoes program; the same can be said for enemies who innately have those programs as ability.
- Might and Magic VII and VIII:
- Armageddon spell. Deals damage to everyone on the map, including yourself.
- Certain artifacts work like this, usually giving bonuses to some stats while decreasing others, or in case of one weapon, inducing a fireball explosion every time the weapon hits (which damages both the target and you).
- Several cards from the Arcomage minigame work like this:
- Brick Shortage: All players lose 8 bricks.
- Goblin Mob: 6 Damage to enemy, 3 Damage to yourself.
- Goblin Archers: 3 Damage to enemy's tower, 1 Damage to yourself.
- Imp: 6 Damage to enemy, all players lose 5 bricks, gems and recruits.
- Berserker: 8 Damage to enemy, 3 Damage to your tower.
- Hellfire Warlocks in Neverwinter Nights 2. They can use Eldritch blasts empowered with Hellfire, but it drains their Constitution stat, giving them less maximum hitpoints. They can also call devils from the Nine Hells to help them fight off their enemies, but the devils have a chance of turning against them.
- In Path of Exile, many unique items have at least one negative mod to go with their positive ones, such as increasing damage dealt with an element while also reducing your resistance to it.
- In Persona Q: Shadow of the Labyrinth, if a character contracts the 'cursed' status effect, it turns all of your damaging attacks into this. The amount of damage you do to an enemy is subtracted from your HP.
- Any attack that confuses the Pokemon who uses it.
- Explosion and Self-Destruct attacks, which deal damage, but render the user incapable of continuing combat.
- The Swagger move actually does this to the enemy. It increases the enemy's attack greatly, but also confuses them, so when they hit themselves it hurts more.
- Any move that does recoil damage, one of them even being called "Double-Edge".
- Any move that lowers the user's stats upon use (unless they have "Contrary").
- Hyper Beam and its variants. If the attack connects, you can't move on the next turn because you have to recharge. However, you don't have to recharge if you miss.
- Starcraft: Siege Tanks deal huge Splash Damage, but often end up killing their own units when the enemy sends melee units (as Terrans lack a melee / damage sponge unit). In Starcraft II, it's noted that siege tank crews have to stay together on shore leave for this reason, and one of the upgrades greatly reduces the damage it does to your own units.
- Warcraft III: The Undead's Unholy Frenzy spell greatly increases the target's attack speed, but does continuous damage to it. The Orc's Purge spell removes all buffs from the target but slows them (even if they're allied).
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