The Kurobyougan is a powerful dōjutsu kekkei genkai; With the ability to See/Manipulate time, space and energy; Its superior in power than the Rinnegan; But its true potential can only be achieved by rare bloodline wielders called Altherian Pureblood. The appearance of the Kurobyougan's first stage is a black iris with then outward spikes, and a silvery gray vortex-shaped pupil; However, if the wielder is an Altherian Pureblood and they reach the second stage, they Kurobyougan changes, gaining colours and other shapes