Vorthan, God of the Cycle

Indestructible
Vorthan, God of the Cycle can't attack or block
unless there are at least 30 cards in your
graveyard.
At the beginning of your upkeep you may put
the top 3 cards of your library in your graveyard,
then you may sacrifice a creature. if you do,
return another target creature from your
graveyard to the battlefield.