Even with Tsunade's unparalleled strength and the support of Konoha's many ninja, she could only hold the Nine-Tails back slightly, buying a little time for Konoha's civilians to flee and evacuate.
"Barrier Team, prepare the Four Violet Flames Formation!"
Sarutobi Hiruzen barked out the order.
Four ninja skilled in Sealing Jutsu immediately stepped forward. Each moved to one of the four sides of the Nine-Tails, squeezed out every last bit of chakra, and rapidly formed hand seals to deploy the Four Violet Flames Formation.
A purplish-red cubic barrier took shape, enclosing the Nine-Tails, who stood a hundred meters tall when upright.
The Four Violet Flames Formation was a powerful Barrier Ninjutsu that required four Jonin-level experts to perform together. In the original story, it had once trapped the Third during Orochimaru's attack on Konoha.
Breaking through the Four Violet Flames Formation was extremely difficult, whether from inside or outside.
But the technique had one fatal flaw: its defensive strength and duration depended on its users' chakra reserves. That was only natural.
The four Jonin had considerable chakra reserves, but the Nine-Tails was simply too enormous. To minimize consumption and strengthen the barrier, they had not expanded the Four Violet Flames Formation to accommodate his massive body.
The barrier's interior was incredibly spacious for an ordinary person, but to the Nine-Tails, it was more cramped than a refrigerator. He was the elephant stuffed inside it.
"Excellent. Organize the evacuation immediately. Leave this to me..."
As Sarutobi Hiruzen issued his orders, he prepared a more powerful Sealing Jutsu. Before he could finish speaking, he saw the trapped Nine-Tails' red fur suddenly bristle.
"Roar!"
The Nine-Tails threw back his head and roared. With a heave of his body and limbs, he easily shattered the Four Violet Flames Formation restraining him.
Before the four