Arthur Harrow was a former Avatar of Khonshu and a previous wielder of the Moon Knight title, who fell disillusioned with Khonshu and instead became devoted to Ammit. He formed a cult of disciples dedicated to bringing her back to life and bestowing her judgment on the world. Harrow's mission to locate her tomb and resurrect her was hindered by the present Moon Knight, Marc Spector, who he was forced to kill. Harrow succeeded in liberating Ammit from her imprisonment and became her Avatar, but he was stopped by a resurrected Moon Knight and Scarlet Scarab, who imprisoned Ammit inside his body. Harrow was administrated to a psychiatric hospital, where he was later assassinated by Spector's alter Jake Lockley, killing Ammit as well.