"Teacher, don't scare me!"
The token in his hand had been given to him by his teacher. Teksen Shiso still remembered how stunned he had been by its effects.
"Shiso, I made this during my time as a spy in Amegakure, when I had no room to practice other large-scale ninjutsu.
"It's a one-use ninja tool called the Heaven-Piercing Substitute. Making one takes half a month without sleep or rest. It was a real pain.
"Its ability is simple. If you ever face an opponent you can't match, and you still have a chance to use it, give it a try.
"It contains your teacher's lifetime of combat experience. Once you activate and accept it, you can temporarily gain your teacher's lifelong battle instincts and briefly enhance the activity of your reaction nerves.
"Don't use it carelessly. The difficulty of making this is no less than creating an S-rank ninjutsu."
Only heaven knew how shocked he had been back then, especially by the casual way his teacher had said it.
A ninja tool capable of storing an entire lifetime of combat experience—even if it was disposable—was obviously immensely powerful.
Combat experience represented a ninja's strength, and now it could actually be lent to someone else. It was deeply shocking.
And its creation was as difficult as inventing an S-rank ninjutsu. One could imagine how hard it had been to create.
Teksen Shiso looked at the enemy still attacking with his technique and activated the ninja tool without hesitation.
Whoosh!
The large characters on the token flashed with blue light the instant chakra was poured into it.
A stream of chakra that did not belong to him rapidly spread along his own chakra before finally connecting to his brain.
It formed a Genjutsu space and linked with Teksen Shiso's mind.
At