Yarus, Roar of the Old Gods 
Legendary Creature — Centaur Druid
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.
Legality
standardLEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL