"Beneath the thick fog, a gigantic insect-like monster with a human face appeared in the village. It began devouring people nonstop, eating and eating, as though it could never get full..."
"To kill this monster, the Land of Sea's daimyo hired ninja from neighboring Kirigakure to help, but the monster was absurdly powerful. No matter how many ninja were sent, none could defeat it."
"And not long afterward, all kinds of enormous, mutated summoning beasts appeared on the island one after another. They, too, fed on human flesh or their own kind..."
"The daimyo knew everyone would die if this continued, so he fled overnight with those around him to establish a capital on another island. The surviving villagers followed, leaving one after another..."
"After that, this island became a paradise for summoning beasts."
"The horror of that insect-like monster with a human face was unimaginable. Not only was it enormous, but its eyes were shaped like spirals and possessed extremely powerful ocular power. It could even use genjutsu!"
"It fed on people and other summoning beasts. Once it swallowed something, it absorbed the abilities its food had possessed in life and used them itself. Because it had swallowed hundreds of ninja alive, it could perform all their ninjutsu!"
"Most importantly, it could evolve!"
"The more it ate, the faster it evolved. Its current form is its second stage of evolution. I don't know how many more stages there will be. All I know is that the day it emerges from its cocoon as a complete body will probably be a disaster for this entire world!"
"The Land of Sea's ally, Lord Karatachi Yagura, the former Fourth Mizukage of Kirigakure, named it the Ultimate Summoning Beast. He sent wave after wave of powerful ninja to try to kill it and