Gavin

Summary: Gavin is a warlock sent from the future to rid of a vaccine that will kill all demons/warlocks. He kills anyone who may of had a hand in the development of the vaccine, he kills his victims with a lazer that comes out of the third eye which is in his forehead. This is not visible until he attacks his victims which then drains the lifeforce from them.

There is no spell to kill Gavin, Prue and Piper killed him when they attacked him in his 3rd eye, he was then taken back to the future.