Quote (Numberwanx @ Feb 5 2015 11:20pm)
wut dat
http://tokyoghoul.wikia.com/wiki/KakujaBiology:It is said that through cannibalism, a ghoul absorbs Rc cells, and this uptake of Rc cells increases their concentration within a ghoul's body. If the concentration becomes high enough, it may trigger a mutation within the cells and lead to the formation of a new kagune.
A kakuja can evolve their armor kagune further by continuing to cannibalize their kind. For instance, while the One-Eyed Owl had a human-shape and size before its disappearance, it eventually developed into a much larger and monstrous form during its attack at Anteiku.
pretty awesome that kaneki killed that guy with the OP armor.