Fiendish Soulstinger

Victimize, victimize, victimize (Whenever
you activate an ability of a creature you control, you may pay {b/r}. If you do, this creature deals 1 damage to target creature or player. Then do it again. Then do it again.)
{t}: Add {b} or {r} to your mana pool. You
may not spend this mana to cast spells.