Tamura Hiroshi transformed into the Second and became an iron miner. Hundreds of miles away, he found an iron ore vein in the sea, manifested Shukaku's form, and used Iron Sand Magnet Release to mine the iron bit by bit.
He then used the Two-Tails' flames and the Four-Tails' Scorch Release to melt and refine it into steel. Finally, he slowly shaped it into the desired form. After a month, he had created a hollow iron sphere two hundred meters in diameter, with a mesh structure made from countless steel bars inside.
Shikaku Nara and the others dismantled the entire aerial fortress of Sky Ninja Village and rebuilt it inside the iron sphere with the materials. They first restored the flight apparatus, giving the massive iron ball the ability to fly, and continued their journey.
After wandering around like this for over a month, they finally arrived at a strange place one dark and windy night.
The surrounding land was barren. Only the very center held some greenery, along with a sinkhole.
"This is the legendary sacred land. It's also called the Cave. They say a secret treasure is buried there."
Tamura Hiroshi looked down at the sinkhole. It was their next target.
He had little interest in the method used to create thunderclouds. What interested him was the way that energy catalyzed living things.
It was clearly an application of life energy, making it extremely valuable for his research. In particular, he needed it for his upcoming research into creating an Ultimate Summoning Beast.
"They say this place has a guarding force. It seems a battle will be unavoidable."
Shikaku Nara was also looking at the sinkhole. Although it was still night and visibility was poor, he could make out the strange features of the place.
The surrounding area