In Hitmans “Ace of Killers” storyline, Tommy Monaghan faces a hellish threat. The Arkannone, a cabal of creatures residing in Hell, seeks revenge against Tommy for a previous attack. To stop them, Tommy sends Catwoman and Etrigan the Demon on a quest to retrieve the “Ace of Killers,” a powerful gun capable of stopping the skeletal demon Mawzir, who stands at a towering 10 feet and wields artillery. The story combines humor, violence, and supernatural elements, making it a memorable addition to the Hitman series.