Sapseep Key
Land (Rare)

When Sapseep Key enters the battlefield, you lose 2 life unless you reveal a multicolored card from your hand.

GU, Tap: Add GG, GU or UU to your mana pool.

2G: Sapseep Key becomes a 2/2 green and blue Squirrel creature with trample until end of turn. It's still a land.

Aleksi Grant West