So, this is a necromancer by the name of Once. He wasn't really a reknown character. He resided in the city once known as Xesyle, home to a race of people known as Khedevans. Soon as they realized in a school of magic he attended that he was practicing Necromancy, he was thrown out and made resentful. Falling into a life of thievery and scheming, he grew lonely despite growing in riches. So, he had a summon by the name of Xuubeinth, an embodiment of his sin that was supposed to haunt him. However, it simply granted him a friend, whom he cared for depsite actions requiring that being immoral.
Once the Suicide King had runned life in Xesyle to a state of suffering being equal to living, he committed suicide among many others in a pact to escape the wretched kings sudden change to the way of life that they lived. Only before this though, did he grant Xuubeinth a free soul. One could find the skeletal hand of Once still at his necromantic spawns side.