Molerat

If Molerat attacks alongside copies of itself,
then it gains trample and a +1/+0 until end of
turn along with its copies.
Molerat can be cast from your graveyard for {b}{2} + {x} where X is the number
of times it has entered the
graveyard. When it is cast from the graveyard,
it creates a copy of itself equal to X and gains
haste along with its copies.