Flying Raid — When Wingmate Roc enters, if you attacked this turn, create a 3/4 white Bird creature token with flying. Whenever Wingmate Roc attacks, you gain 1 life for each attacking creature.
2014-09-20
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.
2018-01-19
Raid abilities care only that you attacked with a creature. It doesn't matter how many creatures you attacked with, or which opponent or planeswalker controlled by an opponent those creatures attacked.
2018-01-19
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 or planeswalker it attacked doesn't have to still be in the game or on the battlefield, respectively.