Starting from Douluo Dalu as an Enhancement Merchant

This is a story about a protagonist who exploits (cross that out) helps powerful people in various worlds become even stronger.

Douluo: Classmate Qian Xunji, want to give it a shot? One shot and you’ll become a god~

One minute later: Hey, your six-winged angel Martial Soul’s wings have fused and evolved into giant angel wings!

Qian Xunji: Die!!!

Naruto: Uchiha Obito, want to strengthen your Sharingan? An Eternal Mangekyo, freely controllable, with no side effects and no risk of going blind~ It might even evolve into a Rinnegan. Want to give it a shot?

Five minutes later…

Hey, hey, hey, could you deactivate your Susanoo first? I told you the enhancement might fail, didn’t I?

What? I didn’t say that? You must have misremembered. I definitely said it!

Besides, you haven’t gone blind, have you? I’ll take a loss and enhance it again to undo the change. I guarantee it’ll work this time.

Battle Through the Heavens: Classmate Xiao Yan, want to enhance your Heavenly Flames? I can turn Bone Chilling Flame into one of the top three Heavenly Flames~ Look, here’s a glowing review from Uchiha Obito of the Naruto world. Quality guaranteed!

Three minutes later…

Thanks for your business, and don’t forget to leave a good review, dear. As payment, I’ll take Medusa, one of your future wives…

Xiao Yan: You’re dead!