Ectoplasm

On upkeep put a replication counter on Ectoplasm. If there are three or more replication counters on Ectoplasm, remove those counters and create a token that is a copy of Ecoplasm.
{2}{g}{g}, {t}: Sacrifice Ectoplasm and another card called Ectoplasm, create a 4/4 black and green Ooze creature token with trample.

"Its form shifts and splits, defying reality, as it hungers for the essence of the living."