Once he determined that Super Ten-Tails possessed Yachihoko, Sasuke tensed, body and mind.
Uchiha Hikari's eye power could place a "Seal" on a person's spiritual body through eye contact. Once the Seal took hold, her dōjutsu, Yachihoko, could connect to and control that person's chakra and mind at will, regardless of distance!
In his previous life, Uchiha Hikari had unleashed Engraved Tsukuyomi with the help of Kirutsugu, a rogue ninja from Amegakure, placing a Seal on all of humanity and manipulating Naruto into starting the Fifth Shinobi World War.
Yachihoko had even seized control of all humanity's minds and chakra. Had Sasuke not noticed something strange about the moon and immediately activated Sustained Susanoo to block the light emitted by Engraved Tsukuyomi, he likely would not have escaped either.
Yachihoko was a technique that spelled utter doom once it struck. He absolutely, absolutely could not let himself be marked with a Seal!
Sasuke formed a two-finger hand seal and used Yin Release as a medium to cast the Yamanaka Clan's Mind Transmission Technique.
"Obito, from this moment on, don't make eye contact with the Ten-Tails!"
Sasuke's grave warning rang out in Obito's mind.
At this distance, he's using mind transmission instead of speaking directly... Is he afraid of putting the Ten-Tails on its guard?
Without betraying anything outwardly, Obito replied in his mind, What is it? Does the Ten-Tails have a genjutsu like Tsukuyomi or Kotoamatsukami that takes effect through eye contact?
There are ways to deal with genjutsu, but I'm afraid this is even deadlier... You know about Yachihoko, don't you?
Obito's heart tightened. *But doesn't that technique require something called Engraved Tsukuyomi? Although Engraved Tsukuyomi and Infinite Tsukuyomi work differently, both essentially use the moon as an amplifier to spread eye power through light. There's no moon above