Motaki, Ambush Predator

Skulk, Deathtouch
Motaki, Ambush Predator can't block.
{b}{b}{r}{r}, {t}: Destroy target creature.
{b}{b}{r}{r}, {t}, Sacrifice a creature: Motaki deals
X damage to target creature or player, where X
is the sacrificed creature's power combined
with Motaki's power.
"An eye for an eye? But what about the interest?"