Cerastes, The Voracious

Haste, Devour 1.
Cerastes can block an extra creature for each
+1/+1 counter on Cerastes.
Cerastes deals no combat damage while blocking
if it attacked during your last turn.
Whenever a creature dealt damage by Cerastes
this turn dies, put a +1/+1 counter on Cerastes.
{b}, {t}, Exile a creature card from a graveyard:
put a +1/+1 counter on Cerastes.