Kami no Kado

The Gates of the Gods ( 神の門, Kami no Kado) are a variation of Time-Space Ninjutsu, a branch of summoning, and are literal gateways to alternate dimensions that chosen members of the Shuhou Clan have access to. The first dimension that was found was the Sky Gate but it has yet to be re-opened after it's first use. Like Summoning Domains, each Gate has a leader but also contain an Eihei (衛兵, sentinel) who protects each dimension, they also serve as escorts for those who come seeking the leaders within. The leaders of each Gate run a series of trials on the individual(s) who come to test their character and abilities. Each leader bestows a certain set of gifts to those who pass or show strong conviction during the trials. It's noted that not everyone has to be successful in their trials to gain a favor. The gifts can be anything from an S or A rank ability, an ancient tome/scroll, knowledge, or a weapon.

There is always a trick, however, and one should never trust a soul they meet within the Gates, for they all have their own agendas. Each gate is full of a special kind of natural energy that forcibly changes the appearance of those who enter. All on the whim of the leader who dwells within. In the second Gate she visited, Kurei's hair grew longer and turned white, as did her eyes, though the coloring reverted to normal once she left. Her hair, however, retained it's length until she got it cut.