The Speedrun Manual of Miss Witch - Chapter 39 - The Plaguebearer and the Source of Cholera (Part 3)

Though he received the skills necessary to teleport across worlds, the king who performed the summoning ritual attempted to trick him into wearing a slavery collar, this annoyed him so he kidnapped the princess and returned to Earth.

When Shen Fei awakened as a Summoner, he also awakened the talent: gaining Golden Terms as his level goes up, and he's able to grant terms to his Summoned Beasts.[Mountain Giant] + [Vast Heaven Overlord Body] = [Vast Heaven Holy Spirit][Flame Spirit] + [Great Five Elements Skill] = [Five Elements Empress][Yin Ghost's Thorn] + [Heaven-Slaying Sword Drawing Skill] = [Stabbing Immortal]

The sky was painted gray forever. The light of the sun was restrained. The darkness of the night was deeper than ever. At such a time, he belonged to a class people didn’t even recognize as ’human’. He was at the bottom of the social stratum, a slave. And when his only family was taken away from him... he no longer had a purpose in life. Yet, he clung to life because of his promise. And he set an impossible goal for himself, just so he’d have an excuse to live. When he finally reached a place he never expected to be, in pursuit of a purpose he expected to fail and die miserably trying to fulfill... he awoke to a night that would change his entire life. He was an insignificant fly, a mere speck in the destruction of the Empire. But he... survived. And, despite being a slave, he gained the blessing of a king. Or rather, the curse...

What if something made Naruto the dead-last that everyone perceives him to be? What if he really wasn't as weak as he appeared? The true Naruto, unleashed upon the shinobi world! AU story starts at the Konoha Invasion arc and continues from there..