Ravenous Troll

Regeneration 2 (Whenever this creature is dealt
damage, put two +0 /+1 counters on it.)
If a creature dealt damage by Ravenous Troll
would die this turn, put a +2/+0 counter on
Ravenous Troll and it gains trample.
"A troll's appetite far exceeds that of any other
creature of its size, as does it's temper."