Savras, the Gambler

Whenever Savras, the Gambler blocks, you may
roll a d6. Reduce the damage dealt by the number
rolled. If the damage is reduced to 0, it becomes
tapped and does not untap during its controller's
next untap step.
{b}{b}: Target creature has -1/-1 until the end of
turn.
"Looks like you made a bad bet, friend."