Burst of Fury

If you cast Burst of Fury on an opponent's turn, Sacrifice a creature in addition to paying it's mana cost.
Burst of Fury deals 5 damage to target creature
Madness {2}{r} (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)
The fury of the fire is never-ending