There were a great many problems Shinji needed to deal with right now.
For example, several Upper Moon demons, including Upper Moon One and Upper Moon Two, had escaped the battle in Grass Country and were currently hiding in various corners of the Shinobi World, posing a major threat.
For example, Orochimaru had begun to suspect the true reason Shinji had treated Kimimaro.
For example, after losing another member, would the Otsutsuki Branch Family on the moon resort to even more extreme measures, such as triggering an apocalypse ahead of schedule?
And so on.
But compared to all of these, the truly critical problem was the pollution of the Shinobi World!
Just as the mysterious man had shouted while escaping, "If I go down, I'm taking you with me!" Afterward, Shinji used his Lantern to confirm that the Demon Slayer World's pollution of the Shinobi World had already exceeded the critical threshold. Unless Shinji could raze all the countries surrounding Grass Country to the ground, a collision between the Demon Slayer World and the Shinobi World was inevitable.
That was also one of the reasons Shinji hadn't rushed to deal with the Upper Moon demons and had allowed the various forces in the Shinobi World to study them.
Because compared with the pollution that had already been caused, the existence of those demons was no longer worth worrying about.
As the Lantern Bearer who guarded the Shinobi World, Shinji had certainly not given up.
In his view, the mysterious man had invaded the Shinobi World time and again, bringing pollution with him. He couldn't have been aiming to take the Shinobi World down with him from the very beginning.
That would serve no purpose for him or the Demon Slayer World!
So there had to be some reason behind his