Black Oni

The Black Oni is the sixth boss in the new raid in Patch X-20: Prelude to the Rise. The oni is described as a more demonic construct, serving as a foil to the Red Tetsu. It was brought back by Grimmok and OMNI through continuum manipulation. The reason why Black Oni wasn't made in the new timeline was because the materials made to build Red Tetsu were "in-season".