Shadow-Flame Trio

Unleash (You may have this creature enter the battlefield as a +1/+1 counter on it. It can't block
as long as it has a +1/+1 counter on it.)
Whenever a creature that was dealt damage
or destroyed by an instant or sorcery spell
you control is put into a graveyard deal 1 damage to each opponent and you gain 1 life.
I will mutilate him! No, Him! NO, HIM!