Teval, the Balanced Scale - 8 M TDC

Flying
Whenever Teval attacks, mill three cards. Then you may return a land card from your graveyard to the battlefield tapped.
Whenever one or more cards leave your graveyard, create a 2/2 black Zombie Druid creature token.

mythic
Legendary Creature — Spirit Dragon
From the Magic: The Gathering set Tarkir: Dragonstorm Commander.