Grassy Marsh
Land-Forest Island (Rare)

(Tap: Add G or U to your mana pool.)

When Grassy Marsh enters the battlefield, sacrifice it unless you pay U.

2G, Tap: Regenerate target multicolored permanent.

1, Tap: Target land becomes a 2/2 blue Shapeshifter creature until end of turn. It's still a land.

Justin Walker