Natsuki crouched down, pressed a hand against the seal, and used his own Chakra to probe the Dragon Vein's mass of energy.
"Hm?" A look of surprise crossed Natsuki's face.
"What is it, Natsuki?" Minato asked.
Natsuki had only just sent a thread of Chakra into it when the energy within the Dragon Vein began converging toward him on its own.
His Chakra did not probe very deeply before it was completely neutralized by the Dragon Vein's energy.
Natsuki pondered for a moment. "Watch over my body. I'll use the Spirit Transformation Technique to go inside and take a look."
Minato was startled. "Isn't that too risky?"
Natsuki shook his head. His Soul Strength had already reached the level of Kekkei Mōra.
"Don't worry. There won't be any danger."
Seeing that Natsuki had made up his mind, Minato did not try to dissuade him. "All right. Be careful."
Natsuki formed hand seals, and a soul emerged from his body.
Then it entered the Dragon Vein's seal.
Even in his Soul Body, Natsuki remained highly attractive to Dragon Vein Energy.
The Dragon Vein Energy began gathering around Natsuki, but his Soul Body had no medium to contain it.
The Dragon Vein Energy could only converge before passing straight through him.
The Dragon Vein was like a dormant volcano. Natsuki began probing toward the center, where the energy was most concentrated.
When he had probed it earlier, he had seemed to "hear" someone calling him.
At the very center of the lowest layer, Natsuki discovered a denser mass of Dragon Vein Energy.
This mass of energy was the source of the entire Dragon Vein.
And it seemed to possess a spirit...
Carefully, he projected his thoughts toward it.
"Are you the Dragon Vein?"
The mass of Dragon Vein Energy trembled slightly, conveying