Triggered ability: Difference between revisions
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>Murgatroid99 (Updated rules to Kahns of Tarkir) |
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{{Navigation CR|600}} | {{Navigation CR|600}} | ||
{{CR| | {{CR|Kahns of Tarkir|*'''603.''' Handling Triggered Abilities | ||
**'''603.1.''' Triggered abilities have a trigger condition and an effect. They are written as "[Trigger condition], [effect]," and begin with the word "when," "whenever," or "at." They can also be expressed as "[When/Whenever/At] [trigger event], [effect]." | **'''603.1.''' Triggered abilities have a trigger condition and an effect. They are written as "[Trigger condition], [effect]," and begin with the word "when," "whenever," or "at." They can also be expressed as "[When/Whenever/At] [trigger event], [effect]." | ||
**'''603.2.''' Whenever a game event or game state matches a triggered ability's trigger event, that ability automatically triggers. The ability doesn't do anything at this point. | **'''603.2.''' Whenever a game event or game state matches a triggered ability's trigger event, that ability automatically triggers. The ability doesn't do anything at this point. | ||
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***'''603.2b''' When a phase or step begins, all abilities that trigger "at the beginning of" that phase or step trigger. | ***'''603.2b''' When a phase or step begins, all abilities that trigger "at the beginning of" that phase or step trigger. | ||
***'''603.2c''' An ability triggers only once each time its trigger event occurs. However, it can trigger repeatedly if one event contains multiple occurrences. See also rule 509.4. {{CR Example|A permanent has an ability whose trigger condition reads, "Whenever a land is put into a graveyard from the battlefield, ...." If someone casts a spell that destroys all lands, the ability will trigger once for each land put into the graveyard during the spell's resolution.}} | ***'''603.2c''' An ability triggers only once each time its trigger event occurs. However, it can trigger repeatedly if one event contains multiple occurrences. See also rule 509.4. {{CR Example|A permanent has an ability whose trigger condition reads, "Whenever a land is put into a graveyard from the battlefield, ...." If someone casts a spell that destroys all lands, the ability will trigger once for each land put into the graveyard during the spell's resolution.}} | ||
***'''603.2d''' Some trigger events use the word "becomes" (for example, "becomes | ***'''603.2d''' Some trigger events use the word "becomes" (for example, "becomes attached" or "becomes blocked"). These trigger only at the time the named event happens—they don't trigger if that state already exists or retrigger if it persists. An ability that triggers when a permanent "becomes tapped" or "becomes untapped" doesn't trigger if the permanent enters the battlefield in that state. {{CR Example|An ability that triggers when a permanent "becomes tapped" triggers only when the status of a permanent that's already on the battlefield changes from untapped to tapped.}} | ||
***'''603.2e''' If a triggered ability's trigger condition is met, but the object with that triggered ability is at no time visible to all players, the ability does not trigger. | ***'''603.2e''' If a triggered ability's trigger condition is met, but the object with that triggered ability is at no time visible to all players, the ability does not trigger. | ||
***'''603.2f''' An ability triggers only if its trigger event actually occurs. An event that’s prevented or replaced won’t trigger anything. {{CR Example|An ability that triggers on damage being dealt won't trigger if all the damage is prevented.}} | ***'''603.2f''' An ability triggers only if its trigger event actually occurs. An event that’s prevented or replaced won’t trigger anything. {{CR Example|An ability that triggers on damage being dealt won't trigger if all the damage is prevented.}} | ||
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***'''603.6b''' Continuous effects that modify characteristics of a permanent do so the moment the permanent is on the battlefield (and not before then). The permanent is never on the battlefield with its unmodified characteristics. Continuous effects don't apply before the permanent is on the battlefield, however (see rule 603.6e). {{CR Example|If an effect reads "All lands are creatures" and a land card is played, the effect makes the land card into a creature the moment it enters the battlefield, so it would trigger abilities that trigger when a creature enters the battlefield. Conversely, if an effect reads "All creatures lose all abilities" and a creature card with an enters-the-battlefield triggered ability enters the battlefield, that effect will cause it to lose its abilities the moment it enters the battlefield, so the enters-the-battlefield ability won't trigger.}} | ***'''603.6b''' Continuous effects that modify characteristics of a permanent do so the moment the permanent is on the battlefield (and not before then). The permanent is never on the battlefield with its unmodified characteristics. Continuous effects don't apply before the permanent is on the battlefield, however (see rule 603.6e). {{CR Example|If an effect reads "All lands are creatures" and a land card is played, the effect makes the land card into a creature the moment it enters the battlefield, so it would trigger abilities that trigger when a creature enters the battlefield. Conversely, if an effect reads "All creatures lose all abilities" and a creature card with an enters-the-battlefield triggered ability enters the battlefield, that effect will cause it to lose its abilities the moment it enters the battlefield, so the enters-the-battlefield ability won't trigger.}} | ||
***'''603.6c''' Leaves-the-battlefield abilities trigger when a permanent moves from the battlefield to another zone, or when a phased-in permanent leaves the game because its owner leaves the game. These are written as, but aren't limited to, "When [this object] leaves the battlefield, ..." or "Whenever [something] is put into a graveyard from the battlefield, ..." An ability that attempts to do something to the card that left the battlefield checks for it only in the first zone that it went to. An ability that triggers when a card is put into a certain zone "from anywhere" is never treated as a leaves-the-battlefield ability, even if an object is put into that zone from the battlefield. | ***'''603.6c''' Leaves-the-battlefield abilities trigger when a permanent moves from the battlefield to another zone, or when a phased-in permanent leaves the game because its owner leaves the game. These are written as, but aren't limited to, "When [this object] leaves the battlefield, ..." or "Whenever [something] is put into a graveyard from the battlefield, ..." An ability that attempts to do something to the card that left the battlefield checks for it only in the first zone that it went to. An ability that triggers when a card is put into a certain zone "from anywhere" is never treated as a leaves-the-battlefield ability, even if an object is put into that zone from the battlefield. | ||
***'''603.6d''' Normally, objects that exist immediately after an event are checked to see if the event matched any trigger conditions. Continuous effects that exist at that time are used to determine what the trigger conditions are and what the objects involved in the event look like. However, some triggered abilities must be treated specially | ***'''603.6d''' Normally, objects that exist immediately after an event are checked to see if the event matched any trigger conditions. Continuous effects that exist at that time are used to determine what the trigger conditions are and what the objects involved in the event look like. However, some triggered abilities must be treated specially. Leaves-the-battlefield abilities, abilities that trigger when a permanent phases out, abilities that trigger when an object that all players can see is put into a hand or library, abilities that trigger specifically when an object becomes unattached, abilities that trigger when a player loses control of an object, and abilities that trigger when a player planeswalks away from a plane will trigger based on their existence, and the appearance of objects, prior to the event rather than afterward. The game has to "look back in time" to determine if these abilities trigger. {{CR Example|Two creatures are on the battlefield along with an artifact that has the ability "Whenever a creature dies, you gain 1 life." Someone plays a spell that destroys all artifacts, creatures, and enchantments. The artifact's ability triggers twice, even though the artifact goes to its owner's graveyard at the same time as the creatures.}} | ||
***'''603.6e''' Some permanents have text that reads "[This permanent] enters the battlefield with ...," "As [this permanent] enters the battlefield ...," "[This permanent] enters the battlefield as ...," or "[This permanent] enters the battlefield tapped." Such text is a static ability—not a triggered ability—whose effect occurs as part of the event that puts the permanent onto the battlefield. | ***'''603.6e''' Some permanents have text that reads "[This permanent] enters the battlefield with ...," "As [this permanent] enters the battlefield ...," "[This permanent] enters the battlefield as ...," or "[This permanent] enters the battlefield tapped." Such text is a static ability—not a triggered ability—whose effect occurs as part of the event that puts the permanent onto the battlefield. | ||
***'''603.6f''' Some Auras have triggered abilities that trigger on the enchanted permanent leaving the battlefield. These triggered abilities can find the new object that permanent card became in the zone it moved to; they can also find the new object the Aura card became in its owner's graveyard after state-based actions have been checked. See rule 400.7. | ***'''603.6f''' Some Auras have triggered abilities that trigger on the enchanted permanent leaving the battlefield. These triggered abilities can find the new object that permanent card became in the zone it moved to; they can also find the new object the Aura card became in its owner's graveyard after state-based actions have been checked. See rule 400.7. | ||
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**'''603.8.'''Some triggered abilities trigger when a game state (such as a player controlling no permanents of a particular card type) is true, rather than triggering when an event occurs. These abilities trigger as soon as the game state matches the condition. They'll go onto the stack at the next available opportunity. These are called ''state triggers''. (Note that state triggers aren't the same as [[state-based effects|state-based actions]].) A state-triggered ability doesn't trigger again until the ability has resolved, has been countered, or has otherwise left the stack. Then, if the object with the ability is still in the same zone and the game state still matches its trigger condition, the ability will trigger again. {{CR Example|A permanent's ability reads, "Whenever you have no cards in hand, draw a card." If its controller plays the last card from his or her hand, the ability will trigger once and won't trigger again until it has resolved. If its controller casts a spell that reads "Discard your hand, then draw that many cards," the ability will trigger during the spell's resolution because the player's hand was momentarily empty.}} | **'''603.8.'''Some triggered abilities trigger when a game state (such as a player controlling no permanents of a particular card type) is true, rather than triggering when an event occurs. These abilities trigger as soon as the game state matches the condition. They'll go onto the stack at the next available opportunity. These are called ''state triggers''. (Note that state triggers aren't the same as [[state-based effects|state-based actions]].) A state-triggered ability doesn't trigger again until the ability has resolved, has been countered, or has otherwise left the stack. Then, if the object with the ability is still in the same zone and the game state still matches its trigger condition, the ability will trigger again. {{CR Example|A permanent's ability reads, "Whenever you have no cards in hand, draw a card." If its controller plays the last card from his or her hand, the ability will trigger once and won't trigger again until it has resolved. If its controller casts a spell that reads "Discard your hand, then draw that many cards," the ability will trigger during the spell's resolution because the player's hand was momentarily empty.}} | ||
**'''603.9.''' Some triggered abilities trigger specifically when a player loses the game. These abilities trigger when a player loses or leaves the game, regardless of the reason, unless that player leaves the game as the result of a draw. See rule 104.3. | **'''603.9.''' Some triggered abilities trigger specifically when a player loses the game. These abilities trigger when a player loses or leaves the game, regardless of the reason, unless that player leaves the game as the result of a draw. See rule 104.3. | ||
**'''603.10.''' Some objects have a static ability that's linked to | **'''603.10.''' Some objects have a static ability that's linked to one or more triggered abilities. (See rule 607, "[[Linked Abilities]].") These objects combine the abilities into one paragraph, with the static ability first, followed by each triggered ability that's linked to it. A very few objects have triggered abilities which are written with the trigger condition in the middle of the ability, rather than at the beginning. {{CR Example|An ability that reads "Reveal the first card you draw each turn. Whenever you reveal a basic land card this way, draw a card" is a static ability linked to a triggered ability.}}}} | ||
== Examples == | == Examples == | ||
Revision as of 18:25, 28 September 2014
A triggered ability is an ability that automatically does something when a certain set of conditions are met.
A triggered ability can be identified by the words "when," "whenever," or "at", which will usually be found at the start of the ability. The phrase that contains one of those words lists the conditions (the trigger event) where the ability will trigger. When it does, most triggers go on the stack, and responses can be played.
Comprehensive Rules
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Examples
A triggered ability can be a mana ability, which means that it doesn't go on the stack, but resolves immediately. Triggered mana abilities have to have the capability to produce mana, and have to trigger off of mana abilities.
Effects can also create a delayed trigger ability, which waits until the next time its conditions are fulfilled, then triggers usually once. (Delayed triggers that state a duration will trigger any time, within that duration, that their trigger event occurs.)
Using triggered abilities are not optional. When triggered, the controller can't refuse to put the ability on the stack. Nor can he or she choose an illegal target, if a target is required. If a targeted ability has no legal targets in play, it still triggers and goes on the stack, but is taken off immediately.
Triggered abilities are cumulative, and multiple instances of the same triggered ability on a permanent will each trigger separately.
External link
- Matt Tabak (February 04, 2013). "Missed Trigger Update". magicthegathering.com. Wizards of the Coast.