Seachrome Park
Land (Rare)

Whenever Seachrome Park becomes tapped, it deals 1 damage to you.

Tap: Add G or U to your mana pool.

Sacrifice Seachrome Park: Add G or U to your mana pool.

GU: Seachrome Park becomes a 2/1 blue and green Merfolk Illusion creature until end of turn. It's still a land.

Allan Critchlow