He traveled to the world of Naruto three years ago and only awakened the system when he was about to die?
Linghu Chong, Yan Shisan, Dugu Qiufei and Wuming become masters?
From now on, it's not like Niubi goes to heaven.
Don't know ninjutsu? So what if all chakra attributes are 0? I have internal strength and those awesome martial arts skills.
This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.