Terrastomper

Terrastomper is black and red.
When Terrastomper enters the battlefield, sacrifice it unless you pay {3}{b}{r}.
Terraform 4 (When this card enters the battlefield, put 4 +1/+1 counters on it and it becomes a 0/1 elemental with haste. It's still a land.)
As long as Terrastomper is a creature, it has trample.