Ferocious Finisher

Target creature you control deals damage equal
to its power to target creature that was dealt
damage this turn.
"And so the hero smited the demon, or perhaps the
demon felled the hero. Either way, the chapter comes
to an end and one moves on, history writes another
hero and demon for the next chapter, and the cycle
continues. What, you expected proper resolution
to this age-old tale?"
—Nohel, God of the Cryptic