Ultraman: I Became the Evil God Gatanothor

Feng Du never asked to be isekai'd into the Ultraman Tiga universe—but when a mysterious cheat ability lands in his lap, he makes the wildest choice possible: merge with Gatanothor, the legendary evil god of darkness. Years later, he follows his brother-in-law to another world, only to watch Tiga get utterly demolished in battle. Fed up, Feng Du unleashes his true power: "Fine! I'll help you this once—Zoga, annihilate them all!" What happens when the ultimate villain becomes the reluctant hero's secret weapon?