Merfolk Fortress
Land (Rare)

Merfolk Fortress enters the battlefield tapped.

Tap: Add U to your mana pool. Activate this ability only if you control an Island.

Tap: Add W to your mana pool. Activate this ability only if you control a Plains.

3: Merfolk Fortress becomes a 2/2 blue Fish creature until end of turn. It's still a land.

Carl Chan