Naruto: Teach Disciples Ten Thousand Times to Return, Teach Naruto Sss-level Ninjutsu at the Beginning

After traveling through Naruto, he became the weak villain Mizuki, and every step he took could lead to a bottomless abyss.

Fortunately, the system is activated and the rewards for teaching are ten thousand times higher.

Granting your apprentice ninjutsu, illusion techniques, physical techniques, ninja tools, items, etc. will receive a system reward of up to 10,000 times.

【bite!】

[You give Naruto a bowl of miso chashu ramen, triggering a thousandfold return.]

[Congratulations on getting a bowl of miso chashu chakra noodles. Eat it all and your chakra limit will increase by 1, Kakashi.]

【bite!】

[You grant Uchiha Sasuke the water-treading training method, triggering a ten-thousand-fold return.]

[Congratulations on acquiring the art of stepping on air. You can step on the air and spiral upwards, and even stay in the air for a short time.]

…

Naruto tradition, teaching the apprentice to kill the master?

That doesn't exist. To me, the master is always stronger than the apprentice.