The undead slayer [Demon slayer x Male Spawn reader]

Y/n L/n was once a man, but tragedy condemned him to become a Hellspawn, bound by a deal with the demon Malebolgia. One day, he found himself in an unfamiliar Japan-one that existed in an entirely different universe. There, he encountered creatures calling themselves "demons," though they paled in comparison to the monstrous entities he had known. He soon crossed paths with a group known as the Demon Slayers, warriors dedicated to eradicating these lesser fiends. Realizing their shared purpose, Y/n chose to fight alongside them, wielding his unholy power against both new adversaries and the ghosts of his past.