Yarus, Roar of the Old Gods is a rare Legendary Creature — Centaur Druid card from Murders at Karlov Manor (MKM), collector number 245. Current market price: $0.18 (foil $0.33), TCGplayer market prices via Scryfall.
Other creatures you control have haste. Whenever one or more face-down creatures you control deal combat damage to a player, draw a card. Whenever a face-down creature you control dies, return it to the battlefield face down under its owner's control if it's a permanent card, then turn it face up.