Lava Prairie
Land (Rare)

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

Tap: Add RW to your mana pool. Return Lava Prairie to its owner's hand.

1W: Lava Prairie becomes a 0/4 red and white Troll creature with defender until end of turn. It's still a land.

James Chan