Raging Leotaur

Trample
Terraform - When Raging Leotaur enters the battlefield, put the top card of your library onto the battlefield face-down with a terraform counter on it. That card is a land and
has "{t}: Add {r} or {g} to your mana pool."
The leotaur is a proud beast once known for its calm demeanor, but the Eldrazi invasion has made it ferocious.