Glowing Behemoth

Trample, Menace.
Glowing Behemoth deals damage as -1/-1
counters equal to it's power.
Once this card destroys an opponent's final card
in the combat stack, roll a d20. Below 10, deal any
remaining damage to its nearest, leftmost card
that you control as -1/-1 counters.
Glowing Behemoth must have a friendly creature
card on its left if possible.