Extra's Re-Awakening: I Can Devour Fiend

Liam transmigrated into the world of a novel and became an extra whose fate was to die in obscurity, never to show up in the story even once. In this world of Gods, Fiends, and Mages fighting for hegemony, Liam's existence was so insignificant that he couldn't even survive easily, until... Ding! [Synchronization complete!] [Successfully slain a lesser fiend: Gloom Spider.] [You used your Unique skill: Fiend Devourer.] [Gained Skill: Binding Silk (Uncommon)] He gained the skill Fiend Devourer, which allows him to devour any fiend he kills and gain their skills. In this world overrun by the chaotic menace of fiends, his skill was too overpowered, and his rise was imminent. So, what if he's just an extra? He will become so powerful and grab everything that even the protagonist will fade into the background. Liam's conviction was unmatched as his story had finally begun. ....