In this world, the art of mechanisms is highly advanced. All cultivators under heaven enter the Dao through puppet and mechanical arts, which means cultivation requires a lot of money.

Lu Li, who has transmigrated into this world, is completely penniless. He swears to resist spending beyond his means and absolutely refuses to become a leek harvested by immortals. Even if he dies, he will never take out a loan for so much as half a spirit stone.

Absolutely never!

Until—he encounters an old granny living inside a ring. From then on, at the cost of mortgaging his blood, bones, skin, flesh, and internal organs, he begins modifying his body, falling onto the demonic path…