Ketsuryugan Projection Technique, NarutoData Wiki

Displaying a hologram of an enlarged version of the Ketsuryugan, the hologram will act as a medium for Isamu's ocular techniques, allowing for the Ketsuryugan based genjutsu to be cast through the hologram.

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Ketsuryugan, NarutoData Wiki

10 Fun Facts About the 'Ketsuryugan' (you must know)

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Explaining the Ketsuryugan