Infinite Tsukuyomi projected an eye onto the moon, casting a grand genjutsu upon all humanity... To activate this ultimate ocular technique, one had to become the Divine Tree's Jinchūriki and possess a Rinnegan in both eyes, thereby guiding Kaguya's Rinne Sharingan to the forehead.
Then, from another angle, if one could activate Infinite Tsukuyomi, could one also activate Infinite Amaterasu, Infinite Kamui, and Infinite Kotoamatsukami?
Of course, Yu was now the Ten-Tails' Jinchūriki, not the Divine Tree's Jinchūriki. Thus, he could not guide forth the Rinne Sharingan, nor could he activate the Infinite series of ocular techniques.
(The reason Yu had not absorbed the Divine Tree at this point had already been made quite clear earlier: Kaguya's will existed within the Divine Tree, and Yu did not want unstable power!)
So, strictly speaking... Yu's Infinite Amaterasu needed the word "pseudo" added before it!
Borrowing the principles of Infinite Tsukuyomi, he used Planetary Devastation as a medium, projecting his own Rinnegan onto it to expand the scale and range of Amaterasu!
Amaterasu was originally an inextinguishable flame. Surely someone would ask what the difference was between Amaterasu and Infinite Amaterasu. The answer was about to be revealed!
The eye Yu projected onto the Planetary Devastation took in tens of thousands of mosquito-like Moon Beasts at a glance!
Whoosh! Whoosh! Whoosh! Whoosh! Whoosh!
Then... tens of thousands of blazing Amaterasu flames erupted across their bodies!
That was right. Ordinary Amaterasu could only select a single point of view to unleash its flames! But Infinite Amaterasu had no such limitation. Wherever his gaze reached, black flames burned the heavens!
In mere seconds, the corpses of the burned mosquito beasts fell like dumplings. Once the bodies had been reduced to ashes, the black flames automatically extinguished!
In less than a minute, only several hundred