Immolating Retribution

Revenge — Destroy target attacking creature. If
you were dealt damage by a source an opponent controls since the end of your previous turn,
exile that creature instead. Then if this spell
wasn't cast from your hand, you gain life equal to
that creature's power.
Flashback {5}{w}{w} (You may cast this card from
your graveyard for its flashback cost. Then exile it.)