Ulentagg, Guardian of Ixalan

Defender, Vigilance, Reach
Ulentagg enters the battlefield with five
Slumber counters on it. Whenever Ulentagg
blocks, remove a Slumber counter from it.
Once Ulentagg has no more slumber counters
on it, It loses defender and can attack.
Creatures you control with power 4 or greater
have vigilance.