While Qingyun instructed Yahiko to take Kimimaro and the other eight to investigate Kara's operatives throughout the Shinobi World, deep underground in the Land of Grass, in the Underground Space...
Black Zetsu lurked near Nagato Uzumaki, keeping a close watch on the Rinnegan. Suddenly, a surge of dread gripped him. Immediately afterward, he sensed that the mark he had placed on the Six-Tails had inexplicably vanished.
Previously, Obito Uchiha had attacked Konoha with Kirigakure's Three-Tails and Six-Tails, only to fail at the last hurdle. Minato Namikaze and Kushina had joined forces to seal them beneath the residence where Qingyun lived in Konoha.
Although the Three-Tails and Six-Tails had both been sealed, Black Zetsu could still sense their condition through the marks he had placed on them.
Yet just now, Black Zetsu had suddenly sensed the Six-Tails' presence vanish from the Shinobi World.
Moreover, this disappearance was not the usual process after the Six-Tails died, when its will dispersed throughout the Shinobi World, slowly absorbing energy from the world and gathering chakra to be reborn.
This time, the Six-Tails had truly ceased to exist in the Shinobi World, with no possibility of revival.
How could Black Zetsu not be shocked and furious?
Previously, although Qingyun had been powerful and his goals differed from Black Zetsu's, he had not stood in the way of Black Zetsu's plans.
But now?
The Six-Tails had actually vanished from the Shinobi World for good. What did that mean?
It meant Qingyun possessed the ability to kill tailed beasts permanently.
Although only the Six-Tails had been lost so far, he could still use Impure World Reincarnation to summon its former jinchūriki and revive the Ten-Tails through the chakra remaining within them.
However, now that Qingyun had killed the Six-Tails, there was no guarantee he would not continue