Ulvenwald Hydradile

Ulvenwald Hydradile comes into play with eight
-1/-1 counters on it. Additional -1/-1 counters
cannot be placed on Hydrodile.
Whenever a creature dies, remove a -1/-1
counters from Hydradile.
Hydradile can block X extra creatures, where X is
five minus the number of counters taken off of it.
The only creature known to prey on werewolves,
and sometimes werewolf packs."