Paul Bunyan: The Legend

Trample
{2}{r}{r}{t} Destroy Target Land
{g}{t} add {g}{g}{g} to your mana pool
{r/g}{r/g}{t} Target land becomes a basic land of your choice until end of turn.
He rode through the woods on a
big blue ox, He had fists as hard as choppin' blocks...
-Shel Silverstein