Brimstone Citadel

Brimstone Citadel enter the battlefield tapped unless you control a Mountain or a Swamp. When Brimstone Citadel enters the battlefield, it deals 2 damage to each creature without flying. Damage can't be prevented. Damage is not removed during the cleanup step.
{t}: Add {r} or {b} to your mana pool. Brimstone Citadel deals 1 damage to you.