Although having humble beginnings as an elf, Öoö gradually evolved towards an ethereal force through carefully crafted magic gathered over tens of thousands of years. This has since then made it easier for it to gorge itself on the lifeforce of other living beings to extend its own indefinitely.
Being a living organism made out of pure magic, Öoö’s single purpose is true immortality and unlocking the mysteries of the multiverse. Unlike the lich, Öoö doesn’t store a phylactery to cheat mortality.
Anyone standing against its goals are instantly discarded from existence without any afterthought.