Captain Bones, Undead Captain

Level up {2}{w/b} ({2}{w/b}: Put a level counter on this.
Level up only as a sorcery.)
Level 1-6: Upon level up, create a 1/1 black
Skeleton Pirate creature token. (3/4)
Level 7: {2}{b}{t}: Return target creature card
from your graveyard to the battlefield tapped.
(4/5)