Nakarkos

Nakarkos Toughness is equal to the number of creatures in yor graveyard.
{p/b}{p/b}: Return target creature from the graveyard
and put it under Nakarkos. (They Mutate into the
creature on top plus all abilities from under it.)
Mucus (When Nakarkos blocks or become block,
that target can't attack or block during its controlers
next upkeep.)