Wingmate Roc
Creature — Bird
Flying
Raid — When this creature enters, if you attacked this turn, create a 3/4 white Bird creature token with flying.
Whenever this creature attacks, you gain 1 life for each attacking creature.
イラスト：
Khans of Tarkir#31神話レア英語適正
裁定
Count the number of attacking creatures when the last ability resolves, including Wingmate Roc itself if it's still on the battlefield, to determine how much life you gain.
Raid abilities evaluate the entire turn to see if you attacked with a creature. That creature doesn't have to still be on the battlefield. Similarly, the player, planeswalker, or battle it attacked doesn't have to still be in the game or on the battlefield.
Raid abilities care only that you attacked with a creature. It doesn't matter how many creatures you attacked with or which player, planeswalker, or battle those creatures attacked.