[Invincible from the start + decisive and ruthless + scheming + silver-tongued]
Huo Yanwang transmigrated to the shinobi world after an accident and awakened a System.
The moment it arrived, the System rewarded him with the heaven-defying skill “Infinite Night Guy”: he can use Night Guy endlessly without injury! What’s more, its power doubles every time he uses it!
With this ability, Huo Yanwang was so excited he nearly died.
Day one: I will uphold peace in the shinobi world!
Day two: My rules are the rules!
Day three: I don’t eat beef!
During a sparring match
Someone tosses a lowly kunai his way, and he kicks it back with Night Guy.
Everyone is stunned. “Holy crap! Is that really necessary? They played a pair, and you dropped a rocket launcher?!”
Huo Yanwang: “Can’t be helped. It’s the only skill I know.”
Might Guy, watching from the sidelines, is so shocked he’s dumbfounded. “Why is he completely fine after using Night Guy?! Impossible! Absolutely impossible!”
After that match, people give him the nickname “Living Yama.”
What’s Madara Uchiha supposed to be?
If one Night Guy can’t kill him, then use it a hundred times, with a hundred times the power!
If a hundred times isn’t enough, then use it a million times!
After Huo Yanwang uses Night Guy on Madara Uchiha a hundred times, Madara says shakily, “With taijutsu like that, I, Madara Uchiha, hereby acknowledge you as... my father!”
With Infinite Night Guy in hand, I rule the shinobi world from here on out.
It's a bit too ridiculous and can be read as a demon-adapted fanfic.