Xorax, The Withering

Wither, Persist
When Xorax, The Withering enters the battlefield, put four -1/-1 counters on it.
During your upkeep, if Xorax, The Withering
has a -1/-1 counter on it, remove one -1/-1
counter from Xorax, The Withering then put a
-1/-1 counter on another target creature.