Throws a potion at herself, which causes his power to also backfire him - killing him... Lantern is now death
(Um...The power of the Black lantern IS death. Also, you are controlled by the only and original black lantern, the Black Hand. Also, Kyle doesn't have the powers of a Black Lantern. Also, the original Black Lantern can't die. Also, killing yourself, even if you could, doesn't kill the Black Hand. Also, Black Lanterns, including even Black "Lantern" Piper, can't be killed by anything other then a green lantern or somebody assisted by a green lantern. A Green Lantern's power can substitute the Lantern themselves, however.)