Sorry, Fairies, I'm a Scientist

"What is this?"

"A fusion reactor."

"Huh?"

"An ancient mechanism that extracts spiritual energy from water, purifies and refines it through secret arts, then condenses and fuses it to produce an endless force of pure yang."

"Ah, I see. Your cultivation is profound, and your mastery of mechanisms is so astonishing it's practically supernatural. I truly admire you."

"The price is ten thousand taels of gold."

After transmigrating to a world of immortal cultivation, the great sage Lu of the Mechanical Cult can only explain and sell his inventions this way.

Immortal sect bigwig? Demon sect overlord? Sorry, I'm neither.

I'm a scientist.