One of the four horsemen

Landlink (when this creature is cast choose a color that is shared with it)
If you chose swamps this creature gets deathtouch and you gain 1 life each upkeep for every swamp on the battlefield.

If you chose mountains this creature gets first strike and you gain 1 life each upkeep for every mountain on the battlefield.

{b/r}{t} Target land becomes a swamp or Mountain