Caldera Depths
Land-Swamp Mountain (Rare)

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

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

RR: Put a 1/1 red Dwarf creature token onto the battlefield.

BB, Tap, Sacrifice Caldera Depths: Put a -1/-1 counter on target creature.

Mark Tedin