Cheapest priced copy (Commander 2019): $0.99 at Card Kingdom, near mint, their price list as of .
Wingmate Roc 
Creature — Bird · 3/4 · Mythic · Khans of Tarkir · #31
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.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.99 to $1.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander 2019 | 78 | Mythic | $0.99 | — |
| Khans of Tarkir | 31 | Mythic | $0.99 | $1.99 |
3 rulings from Wizards of the Coast
- 20 September 2014Count 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.
- 8 November 2024Raid 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.
- 8 November 2024Raid 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.