Cave Mire
Land (Rare)

At the beginning of your upkeep, Cave Mire deals 1 damage to target creature you control.

R, Tap: Add BB to your mana pool.

B, Tap: Add RR to your mana pool.

2: Cave Mire becomes a 2/2 red Dwarf creature until end of turn. It's still a land.

Justin Schuler