引き裂かれし永劫、エムラクール

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引き裂かれし永劫、エムラクールがいずれかの領域から墓地に置かれたとき、これのオーナーは自分の墓地を自分のライブラリーに加えて切り直す。

Emrakul, the Aeons Torn

This spell can't be countered.
When you cast this spell, take an extra turn after this one.
Flying, protection from spells that are one or more colors, annihilator 6
When Emrakul, the Aeons Torn is put into a graveyard from anywhere, its owner shuffles their graveyard into their library.

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Annihilator abilities trigger and resolve during the declare attackers step. The defending player chooses and sacrifices the required number of permanents before they declare blockers. Any creatures sacrificed this way won't be able to block.

If a creature with annihilator is attacking a planeswalker, and the defending player chooses to sacrifice that planeswalker, the attacking creature continues to attack. It may be blocked. If it isn't blocked, it simply won't deal combat damage to anything.

"Colored spells" is not synonymous with "colored cards." For example, even though creatures are spells when they're cast, they're not spells when they're on the battlefield and can block Emrakul; and triggered abilities of permanents entering the battlefield (such as that of Banishing Light) can target it.

Emrakul can be targeted by spells that try to counter it (such as Ionize). Those spells will resolve, but the part of their effect that would counter Emrakul won't do anything. Any other effects those spells have will work as normal.

Emrakul can't be the target of colored Aura spells, but colored Auras can be put onto the battlefield enchanting it.

Emrakul's second ability triggers as you cast it, and that ability resolves before the spell itself. It resolves even if that spell is somehow removed from the stack.