Natural Energy

Natsuki closed the scroll.

He kept turning something over in his mind.

Konoha, Orochimaru, Kakashi, the Puppet Curse, Kakuzu, Obito.

A vague idea began to take shape in Natsuki's mind.

Still, it would be a pity if Kakuzu ran away.

Natsuki planned to meet Kakuzu himself.

Aokimaru was still waiting nearby. Natsuki took out paper and pen, wrote a few simple lines, then took out a Flying Thunder God Beacon.

"Take this back to Tenten."

"Yes, Lord Natsuki."

Aokimaru put the items away, then vanished from the area.

Natsuki stepped out of the tent and saw Kabuto Yakushi inspecting the areas around the Rainbow Crystal Walls.

At night, without any light, the Rainbow Crystal Walls had dimmed as well.

The underground heating equipment was also operating much more slowly.

"Lord Natsuki, the technology behind these Geothermal Devices isn't particularly advanced. It's just that this location was chosen very well."

"Only, the materials used for the Rainbow Crystal Walls are very unusual, and I've never seen this technology before."

Natsuki had specifically brought Kabuto Yakushi here because he was a highly educated intellectual and also knew Sage Art.

That made him the best person to investigate this place.

"It doesn't matter if we can't find its origin for now. We'll use it first."

"I plan to turn this place into a training ground dedicated to our Sage Modes."

"After all, it's difficult to gather Natural Energy in the outside world."

Kabuto Yakushi nodded in deep agreement. Any Sage Mode that could be activated would raise one's strength by several levels.

But the greatest drawback of Sage Mode was the difficulty of gathering Natural Energy.

It was basically an hour of charging for three minutes of fighting.

Absorbing Natural Energy in the outside world was extremely slow, so it simply could