The Summoned Beast: The Ultimate Weapon

"The Box of Ultimate Bliss is inside."

So they came for the Box of Ultimate Bliss?!

Only then did Mui, lying on the ground and unable to move, realize what the attackers were after.

Even if the Grass Ninja wanted to use the Box of Ultimate Bliss to dominate the Shinobi World, that was still a conventional struggle between ninja villages! But these strange people in black robes patterned with red clouds?

They clearly weren't from any legitimate ninja village. If they weren't village ninja, they were rogue ninja or underground operatives—and what would they do with the Box of Ultimate Bliss?

In the worst case, they might destroy the Shinobi World! You could never put the bar too low for scum like them!

His sense of duty as warden seemed to give him a final burst of strength. Mui spent his last ounce of energy reaching out to grab Uchiha Yan's pant leg.

But he delayed her for only an instant before she pulled free.

"Perhaps you're a good ninja who takes his duty seriously. If you'd been born in a peaceful Shinobi World, you would have been respected," Uchiha Yan murmured with her back to him. "But unfortunately, the Shinobi World has never known peace."

With that, Uchiha Yan followed Toji.

One person and two clones slipped straight into the prison, as bold as could be.

Bodies lay everywhere inside the prison, too.

A secret technique had drained the chakra from scores of prisoners, leaving them sprawled on the ground. All their chakra had become the key to opening the Box of Ultimate Bliss.

Even after every prisoner there had died, the Box of Ultimate Bliss seemed unsatisfied. It showed nothing more.

Chakra was forcibly drawn from Sōseki, the Two-Tails Jinchuriki, while Shinnō kept pouring his own into