It Took a Hundred Years to Start, but Only After Leaving the Mountain Did I Realize That I Was in the Ninja World

Shi Shangfeng traveled through time, but was told by the sign-in system that this world is extremely dangerous. Since the beginning of civilization, the time of peace will not exceed a hundred days. A strong person can collapse mountains and create seas, and can rub planets with his hands. His probability of survival is extremely low! Fortunately, the system gave him a safe zone with a hundred-year limit. He decided to take advantage of this time to become as powerful as possible. After practicing hard for a hundred years, Shi Shangfeng came out of the mountain after the safety zone failed, but Shi Shangfeng was dumbfounded. What the hell! Is this the ninja world? "Well, it's true that the ninja world is indeed dangerous, but the ability to collapse mountains and create seas is as great as an A-level ninjutsu, and rubbing planets with your hands is as big as the Earth Exploding Stars. Are you scaring me about the system?" "Wait a minute, that watermelon head who accidentally entered the safe zone decades ago founded Konoha? I remember I taught him the Wood Senjutsu, right? That thing is Wood Release? Why didn't you tell the system earlier?" "Also, that gloomy boy who followed in was Uchiha Madara? I remember I hit him on the head..." This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.