Sulfurous Temple
Land-Plains Swamp (Rare)

(Tap: Add W or B to your mana pool.)

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

3: Sulfurous Temple becomes a 2/2 black Rat creature until end of turn. It's still a land.

Lars Deschamps