Xelcnirov, Ancient Titan

Xelcnirov, Ancient Titan enters the battlefield with X slumber counters on it, where
X is the amount of turns taken this game
Xelcnirov, Ancient Titan can't attack as long as there is a slumber counter on it
Trample, Indestructible
If Xelcnirov, Ancient Titan would be put into a graveyard from play, instead exile Xelcnirov, Ancient Titan and it gains Suspend 5