The Author is an Extra, The MC is a Reincarnator - Chapter 33 Enhancing Arash Bow

Waking up in the body of a 6-year-old boy a few years before Cintra is destroyed, Madara receives a system that gives him the ability to gain the powers of Uchiha Madara.[The peak of Uchiha Madara's system is before he becomes the ten-tails jinchuuriki.]The system's percentage does not stop Madara's power, but rather the system's release. After all, I don't want to see a character who goes around killing everyone from the beginning of the story.

In the myriad realms, legends rise and fall in the countless eras.

Thrown into the chaotic “god Verse,” Ryan Stone awakens a power beyond imagining: the SSS-Tier “Ultimate Infinite Extraction System.” While others struggle with mundane abilities, Ryan can deconstruct anything, from monster corpses to ancient artifacts, even the fading signatures of defeated foes, assimilating their essence to achieve limitless growth.From a desperate survivor in a starting outpost, Ryan’s unique talent propels him to unimaginable heights. He outwits cunning rivals, crushes powerful challengers in Sector-wide scrambles, and seizes control of a god Weaver, becoming a Sector Lord. But as he unravels the secrets of the lost Precursors and the cataclysmic Reality Schism that shattered their universe, his system evolves, granting him the power not just to extract, but to impose his will on reality itself.

“I got transmigrated into a novel because of a bad review?”

Eren found his life turned upside down when he woke up as the character that he had just finished cursing in a negative review!

Not only had he been reborn as an antagonist that he hated, but he was an Elder at a Devilish Sect?

It would've been fine if that was the only problem, but that was just the beginning as he remembered that the Character was a spy sent into the Devil Sect by the Mythical Hero Academy... A character that died within the first fifty chapters?!