A spell's owner is the same as the owner of the card that represents it, unless it's a copy. In that case, the owner of the spell is the player under whose control it was put on the stack. A spell's controller is, by default, the player under whose control it was put on the stack. (For noncopy spells, that's the player who cast it.) Every spell has a controller.

A spell's owner is the same as the owner of the card that represents it, unless it's a copy. In that case, the owner of the spell is the player under whose control it was put on the stack. A spell's controller is, by default, the player who put it on the stack. Every spell has a controller.

Some spells, activated abilities, and triggered abilities read, "[Do something]. If [a player] [does or doesn't], [effect]." or "[A player] may [do something]. If [that player] [does or doesn't], [effect]." The action [do something] is a cost, paid when the spell or ability resolves. The "If [a player] [does or doesn't]" clause checks whether the player chose to pay an optional cost or started to pay a mandatory cost, regardless of what events actually occurred.

Example: You control Hesitation, an enchantment that says "When a player casts a spell, sacrifice Hesitation. If you do, counter that spell." A spell is cast, causing Hesitation's ability to trigger. Then an ability is activated that exiles Hesitation. When Hesitation's ability resolves, you're unable to pay the "sacrifice Hesitation" cost. The spell is not countered.

Example: Your opponent has cast Gather Specimens, a spell that says "If a creature would enter the battlefield under an opponent's control this turn, it enters the battlefield under your control instead." You control a face-down Dermoplasm, a creature with morph that says "When Dermoplasm is turned face up, you may put a creature card with morph from your hand onto the battlefield face up. If you do, return Dermoplasm to its owner's hand." You turn Dermoplasm face up, and you choose to put a creature card with morph from your hand onto the battlefield. Due to Gather Specimens, it enters the battlefield under your opponent's control instead of yours. However, since you chose to pay the cost, Dermoplasm is still returned to its owner's hand.

Some spells, activated abilities, and triggered abilities read, "[Do something]. If [a player] [does or doesn't], [effect]." or "[A player] may [do something]. If [that player] [does or doesn't], [effect]." The action [do something] is a cost, paid when the spell or ability resolves. The "If [a player] [does or doesn't]" clause checks whether the player chose to pay an optional cost or started to pay a mandatory cost, regardless of what events actually occurred.

Example: You control Standstill, an enchantment that says "When a player casts a spell, sacrifice Standstill. If you do, each of that player's opponents draws three cards." A spell is cast, causing Standstill's ability to trigger. Then an ability is activated that exiles Standstill. When Standstill's ability resolves, you're unable to pay the "sacrifice Standstill" cost. No player will draw cards.

Example: Your opponent has cast Gather Specimens, a spell that says "If a creature would enter the battlefield under an opponent's control this turn, it enters the battlefield under your control instead." You control a face-down Dermoplasm, a creature with morph that says "When Dermoplasm is turned face up, you may put a creature card with morph from your hand onto the battlefield face up. If you do, return Dermoplasm to its owner's hand." You turn Dermoplasm face up, and you choose to put a creature card with morph from your hand onto the battlefield. Due to Gather Specimens, it enters the battlefield under your opponent's control instead of yours. However, since you chose to pay the cost, Dermoplasm is still returned to its owner's hand.

If an effect says that a player can't gain life, that player can't exchange life totals with a player who has a higher life total; in that case, the exchange won't happen. In addition, a cost that involves having that player gain life can't be paid, and a replacement effect that would replace a life gain event affecting that player won't do anything.

If an effect says that a player can't gain life, that player can't make an exchange such that the player's life total would become higher; in that case, the exchange won't happen. In addition, a cost that involves having that player gain life can't be paid, and a replacement effect that would replace a life gain event affecting that player won't do anything.

If an effect says that a player can't lose life, that player can't exchange life totals with a player who has a lower life total; in that case, the exchange won't happen. In addition, a cost that involves having that player pay life can't be paid.

If an effect says that a player can't lose life, that player can't make an exchange such that the player's life total would become lower; in that case, the exchange won't happen. In addition, a cost that involves having that player pay life can't be paid.

Planeswalkers have their own unique set of subtypes; these subtypes are called planeswalker types. The planeswalker types are Ajani, Bolas, Chandra, Elspeth, Garruk, Gideon, Jace, Karn, Koth, Liliana, Nissa, Sarkhan, Sorin, Tezzeret, and Venser. If two or more planeswalkers that share a planeswalker type are on the battlefield, all are put into their owners' graveyards. This "planeswalker uniqueness rule" is a state-based action. See rule 704.

Planeswalkers have their own unique set of subtypes; these subtypes are called planeswalker types. The planeswalker types are Ajani, Bolas, Chandra, Elspeth, Garruk, Gideon, Jace, Karn, Koth, Liliana, Nissa, Sarkhan, Sorin, Tamiyo, Tezzeret, Tibalt, and Venser. If two or more planeswalkers that share a planeswalker type are on the battlefield, all are put into their owners' graveyards. This "planeswalker uniqueness rule" is a state-based action. See rule 704.

Some enchantments have the subtype "Aura." An Aura enters the battlefield attached to an object or player. What an Aura can be attached to is restricted by its enchant keyword ability (see rule 702.5, "Enchant"). Other effects can limit what a permanent can be enchanted by.

Some enchantments have the subtype "Aura." An Aura enters the battlefield attached to an object or player. What an Aura can be attached to is defined by its enchant keyword ability (see rule 702.5, "Enchant"). Other effects can limit what a permanent can be enchanted by.

An Aura spell requires a target, which is restricted by its enchant ability.

An Aura spell requires a target, which is defined by its enchant ability.

If an Aura is enchanting an illegal object or player, the object it was attached to no longer exists, or the player it was attached to has left the game, the Aura is put into its owner's graveyard. (This is a state-based action. See rule 704.)

If an Aura is enchanting an illegal object or player as defined by its enchant ability and other applicable effects, the object it was attached to no longer exists, or the player it was attached to has left the game, the Aura is put into its owner's graveyard. (This is a state-based action. See rule 704.)

If a non-Aura permanent has an ability that refers to the "enchanted [object or player]" that phrase doesn't refer to any object or player.

If a non-Aura permanent has an ability that refers to the "enchanted [object or player]," that phrase doesn't refer to any object or player.

An effect is said to "depend on" another if (a) it's applied in the same layer (and, if applicable, sublayer) as the other effect (see rules 613.1 and 613.3); (b) applying the other would change the text or the existence of the first effect, what it applies to, or what it does to any of the things it applies to; and (c) neither effect is from a characteristic-defining ability. Otherwise, the effect is considered to be independent of the other effect.

An effect is said to "depend on" another if (a) it's applied in the same layer (and, if applicable, sublayer) as the other effect (see rules 613.1 and 613.3); (b) applying the other would change the text or the existence of the first effect, what it applies to, or what it does to any of the things it applies to; and (c) neither effect is from a characteristic-defining ability or both effects are from characteristic-defining abilities. Otherwise, the effect is considered to be independent of the other effect.

A spell or ability is modal if it has two or more options preceded by "Choose one —," "Choose two —," "Choose one or both —," or "[a specified player] chooses one —." Each of those options is a mode.

A spell or ability is modal if it has two or more options preceded by "Choose one —," "Choose two —," "Choose one or both —," "Choose one or more —," or "[a specified player] chooses one —." Each of those options is a mode.

If an effect tries to attach an Aura, Equipment, or Fortification to an object it can't be attached to, the Aura, Equipment, or Fortification doesn't move. If an effect tries to attach an Aura, Equipment, or Fortification to the object it's already attached to, the effect does nothing.

If an effect tries to attach an Aura, Equipment, or Fortification to an object it can't be attached to, the Aura, Equipment, or Fortification doesn't move. If an effect tries to attach an Aura, Equipment, or Fortification to the object it's already attached to, the effect does nothing. If an effect tries to attach an object that isn't an Aura, Equipment, or Fortification to another object or player, the effect does nothing and the first object doesn't move.

A spell or ability may instruct a player to exchange two numerical values. In such an exchange, each value becomes equal to the previous value of the other. If either of those values is a life total, the affected player gains or loses the amount of life necessary to equal the other value. Replacements effects may modify this gain or loss, and triggered abilities may trigger on them. If either of those values is a power or toughness, a continuous effect is created setting that power or toughness to the other value (see rule 613.3b). This rule does not apply to spells and abilities that switch a creature's power and toughness.

A spell or ability may instruct a player to exchange two numerical values. In such an exchange, each value becomes equal to the previous value of the other. If either of those values is a life total, the affected player gains or loses the amount of life necessary to equal the other value. Replacements effects may modify this gain or loss, and triggered abilities may trigger on it. If either of those values is a power or toughness, a continuous effect is created setting that power or toughness to the other value (see rule 613.3b). This rule does not apply to spells and abilities that switch a creature's power and toughness.

When a player leaves the game, objects that player owns in the ante zone do not leave the game. This is an exception to rule 800.4a. See rule 407, "Ante."

When a player leaves the game, objects that player owns in the ante zone do not leave the game. This is an exception to rule 800.4a. See rule 407, "Ante."

In a Planechase game, if the player designated as the planar controller would leave the game, instead the next player in turn order that wouldn't leave the game becomes the planar controller, then the old planar controller leaves the game. See rule 309.5.

In a Planechase game, if the player designated as the planar controller would leave the game, instead the next player in turn order that wouldn't leave the game becomes the planar controller, then the old planar controller leaves the game. See rule 309.5.

A keyword ability that restricts what an Aura spell can target and what an Aura permanent can be attached to. See rule 303, "Enchantments," and rule 702.5, "Enchant."

A keyword ability that defines what an Aura spell can target and what an Aura permanent can be attached to. See rule 303, "Enchantments," and rule 702.5, "Enchant."

A spell or ability is "modal" if it has two or more options preceded by "Choose one —," "Choose two —," "Choose one or both —," or "[a specified player] chooses one —." Each option is a "mode." See rule 700.2.

A spell or ability is "modal" if it has two or more options preceded by "Choose one —," "Choose two —," "Choose one or both —," "Choose one or more —," or "[a specified player] chooses one —." Each option is a "mode." See rule 700.2.