I Work as a Netherworld Power-Leveling Service in a Magic World

Pure adrenaline + magic cards + wildly unconventional thinking

Struck by lightning and flung into a magical world, Li Xuan is forced to bind himself to the Underworld Temp Worker System. From the start, all he has left is the dregs of his soul. He possesses a gravely injured mercenary, only to face a countdown to rejection! Hunted by monsters, targeted for purification by the Church, and pursued by creditors demanding payment, all he can do is pull out a rusty pickaxe card and refine his wounds and flesh into dark magic cards, using his enemies' ashes as materials to advance...

When a living transmutation array blooms inside his stomach, and contaminated tracking eggs are force-fed until they burst, every faction finally realizes:

This power-leveling mercenary dragging around a rotting body is the most out-of-control bug in the magical world!

(Please, no matter what, leave a comment before you go.)