Ninetails, the Dark Lord

Ninetails, the Dark Lord enters the battlefield
with nine +1/+1 counters on it.
If damage would be dealt to Ninetails, prevent
that damage and remove that many +1/+1
counters from it.
Frenzy X (Whenever this creature attacks and isn't
blocked, it gets +X/+0 until end of turn, where X is
the number of +1/+1 counters on this
creature.)