Useful Notes: Yu-Gi-Oh!
This page contains detailed information about the rules of the Yu-Gi-Oh! card game.
Each player starts the game with 8000 life points and a hand of 5 cards. The aim of the game is nominally to reduce your opponent's life points to 0, though there are other ways to win. Officially, the game is played in a match consisting of best-two-out-of-three duels; casual players will often play just one duel at a time. Each player's turn comprises of six phases:There is also a third grouping, unofficially referred to as archetypes. These are determined by having a common word or phrase in the card name, such as "Ninja" or "Hero". An increasing number of cards specifically affect monsters of specific archetypes, leading players to complain about inflexibility in new booster packs. Monsters may be played in Attack Position (vertical) or Defense Position (sideways). In general, only monsters in Attack Position can attack. note A monster summoned by a card effect is played face-up unless specified. Otherwise, a monster is Normal Summoned face-up in Attack, or Set in face-down Defense. A face-up monster can only be turned face-down again by a card effect. A player may also voluntarily flip a monster face-up during their Main Phase by changing it to attack position (called a Flip Summon). Monsters come in several varieties, denoted by the colour of the border.Spell cards note have a blue-green border. They have various effects that change the rules of the game. They may be played face-up, in which case the effect is activated immediately, or face-down, in which case the effect is activated when the controller flips it face-up. A face-down card can be activated on the same turn it is put into play, with the exception of Quick-Play spells. Spell cards come in several varieties:
Each player starts the game with 8000 life points and a hand of 5 cards. The aim of the game is nominally to reduce your opponent's life points to 0, though there are other ways to win. Officially, the game is played in a match consisting of best-two-out-of-three duels; casual players will often play just one duel at a time. Each player's turn comprises of six phases:
- Draw Phase: The turn player draws a card.
- Standby Phase: No actions are taken by default, but any card effects that mention the Standby Phase would take place now. Trap cards and Quick-Play Spell cards can also be activated during this phase.
- Main Phase 1: Turn player may Normal Summon/Set one monster, and play as many Spell and Trap cards as they wish. Most monster effects can also be activated. Any monsters on the turn player controls not summoned during the current turn may be switched from Attack to Defense position and vice versa.
- Battle Phase: A player may attack with any monsters they have in Attack position. This works as follows:
- Turn player nominates an attacking monster from his/her own field, and a target monster on the opponent's field (attack declaration). If the attack target is face-down, it is flipped face-up before damage calculation.
- If the target monster is in attack position, the monster with the lowest ATK is destroyed. The controller of that monster loses life points equal to the difference in ATK. If both ATK scores are equal, both monsters are destroyed and neither player loses any life points. If the ATK of both monsters is 0, neither monster is destroyed.
- If the target monster is in defense position, and its DEF is lower than the attacker's ATK, the defender is destroyed and nobody loses any life points. Some monsters have effects that let them "inflict piercing Battle Damage" that causes damage to be dealt equal to the difference between the attacker's ATK and the defender's DEF.
- If the target monster is in defense position, and its DEF is equal to or greater than than the attacker's ATK, the attacker loses life points equal to the difference and no monsters are destroyed.
- If the opponent has no monsters on the field, the attacking monster may attack the opponent's life points directly. If such an attack is successful, the opponent loses life points equal to the ATK of the attacking monster. (Some cards may have effects that allow a monster to attack directly regardless of monsters on the opponent's field.)
- Each monster the turn player controls can attempt one attack, unless otherwise specified by a card effect.
- It is important to note that because it is not the Main Phase, only cards and effects that would usually be able to be used during the opponent's turn are able to be used in your Battle Phasenote . In addition, during the Damage Step (the "step" directly before, during, and after damage calculation) only Spells/Traps that specifically modify ATK/DEF and Counter Traps can be activated; exceptions to this rule include card effects that have specific activation triggers that occur in the Damage Step (unless explicitly stated not to), or monster effects that negate other card effects.
- Main Phase 2: Turn player can play any additional spell and trap cards they wish. If they have not already normal summoned a monster, they may do so now. They may also switch the battle positions of any monsters that were not summoned and have not battled this turn. (If the Battle Phase is not entered, Main Phase 2 cannot be entered.)
- End Phase: Similar to the Standby Phase, players take no action by default, but cards that mention the End Phase would have the relevant effects applied. Quick-Play Spells/Traps can be activated. At the very end of the turn, if the turn player has over 6 cards in their hand, they must discard until they have 6 remaining. It is now the opponent's turn.
Monster Card Types
- Normal monsters (yellow border) have no special abilities, and therefore have no effect on gameplay beyond combat (at least, not on their own) - instead, their text boxes contain italicized "flavor text", which can be a description of the monster or offer some sort of backstory.
- Effect monsters (orange border) have special effects that change the rules of the game. There are a few named classes of effect, though most effect monsters do not fall into these classes (that said, not all monsters in these classes exactly follow their classifications either, so the distinction is largely pointless as it's all explained on the card anyway):
- Flip monsters activate when flipped face-up. They are identified by the word "FLIP" at the beginning of their text; note that a monster whose effect instead states "When this card is flipped face-up:" is not treated as a Flip Effect monster.
- Toon monsters generally can only be summoned when the spell card "Toon World" is on the field, and have a significant life point cost attached to attacking. Later toons dropped the latter, and eventually the former requirements. They can attack the opponent's life points directly if the opponent has no Toon monster on the field, but must attack any Toon monsters the opponent does control. If "Toon World" is destroyed while they are on the field, they are also destroyed.
- Spirit monsters return to the player's hand at the end of the turn they are summoned or flipped face-up, and cannot be Special Summoned (bar one). Many of them have incredibly powerful effects because of the difficulty in summoning them and keeping them on the field.
- Union monsters on the field can equip themselves to another (usually specific) monster you control, and apply effects to the equipped monster. They can also unequip themselves to be placed back as a monster. Only one Union monster can be equipped to a given monster at any one time, and in most cases if the equipped monster would be destroyed the Union monster can be destroyed instead.
- Gemini monsters are treated as Normal monsters while in the field or in the graveyard. Their effects must be "unlocked" by the execution of a second Normal Summon, at which point they gain their effects and are treated as Effect monsters until they leave the field or are flipped face-down. (There are cards that unlock the effect without the second summoning, most notably Blazewing Butterfly's own self-tribute effect, and the equip card "Supervise".)
- Token monsters are a special variant, and are not actual cards. Their stats and effects are not written, and are determined by whatever card was used to summon them. When they leave the field for any reason, instead of going to their targeted destination, they're simply removed from the game. Tokens can be Tributed/Fused/used as Synchro Material if allowed. They cannot be used for Xyz Summon, as they cannot exist anywhere than on the field (Xyz Material cards are not treated as monsters). While token cards exist (grey border), other objects like coins can be usednote . Tokens are treated as Normal Monsters for any card effects that refer to Normal/Effect/etc. monsters.
- Fusion monsters (violet border) are stored in a special side area, called the Extra Deck, outside the main deck. They are typically summoned by using a Spell cardnote or other effect to send specific Fusion-Material monsters from the hand or field to the graveyard (or something else, depending on the Fusion card); such a summon is called a Fusion Summon, but there are other cards that allow for other methods of Special Summoning Fusion Monsters (these are not considered to be Fusion Summons). In any case, the resolution of the Fusion/Special Summoning effect allows the fusion monster to be summoned from the Extra Deck. Fusion monsters may also be effect monsters.
- Certain Fusion monsters forego the fusion spell, and can be summoned whenever the appropriate monsters are on the field by shuffling the Fusion Material monsters into the deck or banishing them, depending on the fusion monster in question; this is called Contact Fusion. The main examples of this are the protagonist's Neos fusions from Yu-Gi-Oh! GX. Contact Fusion is not considered to be a form of Fusion Summon, meaning cards that trigger when a monster is fusion summoned cannot be activated. Most contact fusion monsters return themselves to the Extra Deck during the end phase. They are seen as the predecessors to Synchro Monsters.
- There are other Fusion monsters that can only be summoned via a specific Spell card, and are considered the hardest and most situational ones to summon, as they cannot be summoned by other conventional ways, because a) they don't have Fusion Materials; and b) they have conditions stating that they can only be summoned via the stated Spell, and by no other means.
- Ritual monsters (blue border) can only be summoned from the hand by the use of specific spell cards, combined with sacrificing monsters from your field and/or hand whose combined level is at least equal (or in certain cases exactly equal) to the level of the ritual monster. Ritual monsters may also be effect monsters.
- Synchro monsters (white border) are, like Fusion Monsters, stored in the Extra Deck. They are summoned by sending from the field to the Graveyard an appropriate tuner monster, as well as other monsters (called "Synchro-Material Monsters") whose cumulative level is exactly equal to the level of the Synchro Monster. Most Synchro Monsters do not require the use of a specific Tuner or non-Tuner Synchro-Material monsters, though exceptions to this rule exist. Synchro monsters may also be effect monsters.
- Tuner is a secondary variety, which may be applied to normal, effect, or Synchro monsters. A tuner monster is required to summon a Synchro monster. Some Synchro monsters can be summoned with any tuner, some require a particular attribute or type, and some require one specific tuner.
- Xyz monsters (black border with space effects), like Fusion and Synchro monsters, are also placed in the Extra Deck. They are summoned by stacking a printed number of monsters (called "Xyz-Material Monsters") whose levels are all the same as the Xyz monsterís rank and placing the Xyz monster on top of the pile. Most Xyz Monsters do not require specific Xyz-Material monsters, though exceptions to this rule exist. Xyz Monsters do not have levels, so level-based rules and card effects don't apply to themnote .
- Pendulum monsters (half the color depending on the card types above, half-green border) can be summoned normally from the hand OR be played as Spell Cards in the Pendulum Zones at the middle-left and middle-right of the player's field. Once there is a Pendulum monster in each zone, other Pendulum Monsters can be Pendulum Summoned freely from the player's hand or Extra Deck (as well as Normal and Effect Monsters from the hand) as long as their levels are within a range determined by the specific Pendulum monsters played in the Pendulum Zones (it must be between the blue Pendulum Scale of the card in the blue zone, and the red Scale of the card in the red zone). If a Pendulum Monster would be sent from the field to the Graveyard (either as a monster or a spell card), it instead goes face-up to the Extra Deck, where it can be resummoned later if the conditions allow. Of course, Pendulum Monsters may have effects (with the effect used when treated as a Spell Card referred to as a "Pendulum Effect"), but they differ depending on whether the monster is being treated as a monster or Spell Card. Pendulum Monsters that don't have monster effects are also treated as Normal Monsters. If the Pendulum Monster is not a Main Deck card, but an Extra Deck Card, e.g. an Xyz Pendulum Monster, it has to be Special Summoned from the Extra Deck first with the corresponding Special Summoning type, in this case, Xyz Summon.
- Normal spell cards have a wide variety of effects. When the effect resolves, the card is sent to the graveyard. They are typically rather powerful, to compensate for their one-shot nature. No symbol in most media, including the real-world card game (where there is a symbol, it is a capital "N").
- Continuous spell cards stay on the field unless removed by the effect of a card. Their effects last as long as the card is in play, though some are only activated at the controller's decision despite constantly being face-up on the field. If the card is destroyed, any effects stop applying instantly, including trigger-like ones. Symbol: Infinity.
- Equip spell cards represent weapons and items that the monsters can wield; each is attached to one monster card. Most equip cards provide a stat bonus, but some have other effects. They remain in play until removed by the effect of another card, or until the monster they are equipped to leaves the field. Symbol: Plus
- If a monster is equipped to another monster, whether by its own effect or the effect of the monster it's equipped to, the equipped monster is considered to be an Equip Spell, and is no longer treated as a monster. It cannot be affected by cards that target monsters, but can be affected by cards that target spells.
- Quick-Play spell cards can be activated from the hand at any time during the player's turn. If played face-down, they are the only spell cards that can be activated during the opponent's turn, but are then not allowed to be used on the same turn as they are set (much like Trap cards). They are also the only spell cards that can be activated in response to the activation of other card effects. Their effects are activated instantaneously, and the card is then sent to the Graveyard. Symbol: lightning bolt.
- Field spell cards affect the entire field, often granting bonuses or penalties to all monsters of a specified type, attribute, or archetype, though other effects are also possible. Like Continuous cards, Field cards remain in play until destroyed or replaced. Only one field spell can be active at a time for each player; if a player wishes to activate a second Field Spell, they must first send their existing card to the Graveyard. Field spells are played in their own zone, separate from the main spell/trap zone. Symbol: compass.
- Ritual spell cards are used to summon Ritual Monsters. To use a Ritual Spell, one must also hold the corresponding Ritual Monster in one's hand. Symbol: flame.
- Normal traps cards are similar to normal spell cards. When activated, their effect is immediately applied, and then the card is sent to the Graveyard. note No symbol.
- Continuous trap cards are similar to continuous spell cards. When activated, they remain on the field and provide a continuous effect (or an effect that can be repeatedly activated) until destroyed by another card effect. Like Continuous Spells, any trigger-like effects of the card will disappear if the card is destroyed before the effect resolves, but this can be dodged by utilising the Chain effectively. Symbol: infinity.
- Counter trap cards exploit a mechanic known as 'spell speed'. Basically, a counter trap can be activated in response to any other card, but the only card that can be activated in response to a counter trap is another counter trap. Generally, Counter Traps are designed to be activated in response to a certain action, and then negate that action. Symbol: curved arrow.
- If a card or effect is activated, it is automatically considered Chain Link 1.
- If a card or effect is activated in response, it is added to the Chain as Chain Link 2, and so on.
- Spell Speed 1 effects are all monster effects apart from Quick effects, and all Spell cards and effects apart from Quick-Play spells.
- Spell Speed 2 effects are Quick monster effects (in newer card texts, often characterised by the phrase "during either player's/your opponent's turn"), Quick-Play Spells, and Normal or Continuous Trap Cards. These are the effects that can be manually activated outside of the Main Phase.
- Spell Speed 3 effects are Counter Traps only—if someone activates a Counter Trap, the only thing that will stop it is another Counter Trap.
- to reduce the opponent's Life Points to 0—if a player's LP hits 0, they lose instantly.
- if a player cannot draw a card from his/her own deck, due to running out of cards, when they must (such as at the beginning of their turn, or a card effect would force them to draw), they lose, regardless of life points. (Note that if a player has no cards in their deck but never has to draw, they can still win.) Some players build decks specifically to cause this; borrowing a term from Magic, such decks are called 'mill decks'. One variant is The Empty Jar Deck, named after Morphing Jar.
- If both players' LP reach 0 simultaneously (off the same card effect), the duel is a draw.
- If at any time a player holds all five parts of Exodia, they win automatically. If, by some divine magic, both players simultaneously have all five parts in their hand, the duel is a draw.
- "Exodius the Ultimate Forbidden Lord" causes the player to win if they have all five Exodia cards in the graveyard (but only if sent there by the effect of Exodius).
- The card "Last Turn" forces a battle between two monsters, the winner of which wins the duel. If both monsters survive, or both monsters are destroyed, the duel is a draw.note
- If "Destiny Board" (which bears the letter F) and the Spirit Message cards I, N, A, and L are on the field in that order, the controller wins automatically. In the Japanese version, the cards spell out DEATH rather than FINAL.
- "Final Countdown" causes the player to win 20 turns after activation. This includes the turn the card is activated, and each alternation of players counts as 1. In other words, the opponent has 10 of his own moves to win, or he automatically loses.
- "Venominaga the Deity of Poisonous Snakes" gains a Hyper-Venom counter each time it inflicts damage to the opponent. When it has three such counters, its controller automatically wins.
- If a player manages to Summon "The Creator God of Light, Horakhty", they automatically win.
- If a player successfully resolves the effect of "Number 88: Gimmick Puppet of Leo" and adds 3 Destiny Counters, the controller automatically wins.
- If a player controls a "Number C88: Gimmick Puppet Disaster Leo" during the End Phase with no Xyz-Material Monsters while the opponent has 2000 or less Life Points, they automatically win.
- If a player has three "Jackpot 7" banished by their own effect, they automatically win.
- If a player uses Relay Soul, they cannot lose Life Points while the monster summoned by it remains on the field. However, if said monster does leave the field, that player automatically loses.
- If a player manages to attach 10 Xyz Materials to Ghostrick Angel of Mischief, they automatically win.
- In Konami Sanctioned Tournaments, you can also lose if you are given a Game Loss from a Konami Judge for any number of possible reasons, which are explained in the "Tournament Guidelines FAQ".