Yato-Gami, God of Blood

Indestructeble, Wither (It deals damage to
creatures in the form of -1/-1 counters.)
As long as there are less then four creatures with
-1/-1 counters on them, Yato-Gami is not a
creature.
Whenever Yato-Gami transforms or an Ally
enters the battlefield under your control, put a
-1/-1 counter on target creature.