One origin states that he is the sole surviving member of an order of paladins known as the Night Sentinels, who were tasked with protecting their home and native deities, the Wraiths, from Hell. The Doom Slayer was considered particularly special, as the seraphim had given him the ability to grow more powerful from the destruction he caused. He has been wreaking murderous havoc on Hell in retribution for a transgression they made against him that is yet to be revealed, but heavily suggested to be the murder of his beloved pet rabbit, Daisy.