Venomous Hierophant is a common Creature — Gorgon Cleric card from Theros Beyond Death (THB), collector number 122. Current market price: $0.16 (foil $0.28), TCGplayer market prices via Scryfall.
Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.) When this creature enters, mill three cards. (Put the top three cards of your library into your graveyard.)