The official Mutants & Masterminds boards
Kerberos, aka Mark Hale, is the only surviving member of the Guardians, due to not being present when Destroyer struck. Counted as the second most intelligent man in the world, he owns several corporations and is an accomplished crimefighter, using powered armor and a variety of gadgets as well as good old martial arts. After the battle of Manhattan, however, he...simply snapped. After leaving a message saying that the death of all his friends was a direct result of superheroes showing too much mercy, he went to every single prison within LA holding supervillains and killed them. Only Hyena, one of his archvillains, escaped due to not being killable.