Random Card of the Day #192:
Fire Covenant - 1BR
As an additional cost to cast Fire Covenant, pay X life.
Fire Covenant deals X damage divided as you choose among any number of target creatures.
A suicidal black Fireball that only hits creatures. I mean obviously you can run Stuffy Doll. But outside of "as long as I have more life than my opponent I win" combos, the card serves as a very powerful removal tool in Limited.
You might have to play creatures yourself to get more use out of it, but it's not like that's very hard to do.