Cascade Woods
Land-Forest Island (Rare)

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

At the beginning of your end step, if you didn't cast any spells this turn, Cascade Woods deals 1 damage to you.

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

GG, Tap, Sacrifice Cascade Woods: Destroy target artifact.

Carl Moeller