Fuhensei

is the first experimentation and later technique cultivated through Eihei's dōjutsu. A unique form of space-time, it allows the user to place themselves at any location in their given period. Activating the eye, the user steps through a portal that closes upon their entry, before fabricating an infinite number of themselves at various points through the use of life force. Settling upon a specific destination, the user erases their overlapping selves with the dōjutsu. The user is then replaced by their preexisting self at the designated terminus, allowing them to continue on their journey without being inhibited. This variation is generally considered slightly cumbersome by its users, citing the amount of preparation time as ultimately impractical for battle situations, though it is useful for long distance travel. Eihei would later adapt it for inter-dimensional travel, using the foundations to connect with her alternate timelines before stepping into their worlds. She would ultimately employ this subset to find her evil twin when extinguishing Dark Raido's line.