The Blood Ocean was a large reddish sea located on the planet Ysmault that had served as a prison for the Guardians of the Universe. On this world, they imprisoned the demonic members of the Five Inversions terrorist cell which included Atrocitus. These beings were left on the planet to serve their sentence whilst the world was forbidden for anyone to approach. Following the Sinestro Corps War, Atrocitus killed his comrade Qull and used his blood to annoit the first Red Lantern Power Battery. With this at hand, he used it to create his Red Lantern Corps by harnessing the Red Light of Rage who quickly took the world as its headquarters. The Red Lanterns avoided entry into the Blood Ocean as they were all damaged and traumatized beings which was why they were consumed with rage to avoid the