Lake Ring
Land-Island Mountain (Rare)

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

When Lake Ring enters the battlefield, you lose 1 life unless you reveal a multicolored card from your hand.

U, Tap, Sacrifice Lake Ring: Return target creature you control to its owner's hand.

2, Tap: Target land becomes a 3/3 red Giant creature until end of turn. It's still a land.

Douglas Sweet