You may play an energy attack from your hand and pay its costs in order to stop an energy attack. Your opponent takes 1 life card of damage.
I don't want to do this, but you're making me!
Errata:
Treat this card as if it read, “You may play an energy attack from your hand and pay its costs in order to stop an energy attack, and then your opponent discards 1 life card.” All secondary effects printed on that energy attack are resolved, “If successful” effects are not resolved and the defender takes no life cards or power stages of damage.