Hell's Assassin (Assassin's Creed x Helluva Boss/Hazbin Hotel AU)

Y/n was a top tier Assassin. But what happens when Hell's ruler, the Devil himself, asks him to complete a list of targets in Hell against his business, I.M.P.? Although things in Hell seem almost normal, there are Templars hidden in the crowds. Y/n needs to be careful otherwise the Templars will be after him and bloo...