Durge the Unflinching

Whenever Durge the Unflinching enters the battlefield, you may exile any number of cards from your graveyard. Durge gets +X/+X, where X is equal to the number of cards exiled this way.
If you have less than ten cards in your graveyard, Durge the Unflinching has indestructible.
Whenever Durge the Unflinching dies, if you have more than ten cards in your graveyard, return him to the battlefield tapped.