Everquill Phoenix - Promo Pack (PIKO) from Ikoria: Lair of Behemoths, available at 401 Games Canada.

• Rarity: Rare
• Finish: Normal
• Artist: Lie Setiawan
• Card Text:
  Mutate 3R (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)
  Flying
  Whenever this creature mutates, create a red artifact token named Feather with "1, Sacrifice Feather: Return target Phoenix card from your graveyard to the battlefield tapped."