Orvhalos, Reaper of Vis

Hexproof, Unearth {2}{b}({2}{b}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)
Whenever Orvhalos attacks of blocks, return target creature from your graveyard to the battlefield tapped.
Whenever Orvhalos leaves the battlefield, draw a card.