Invocation of Saint Traft is a rare Enchantment — Aura card from Shadows over Innistrad (SOI), collector number 246. Current market price: $0.25 (foil $0.56), TCGplayer market prices via Scryfall.
Enchant creature Enchanted creature has "Whenever this creature attacks, create a 4/4 white Angel creature token with flying that's tapped and attacking. Exile that token at end of combat."