Coolie in the Wizard's Tower

Alive. In this magical world of cannibalism, just staying alive means you have tried your best. Traveling through another world, Zhou Yang did not wait for the "ding" system prompt, but only waited for the supervisor's bloody whip. You start with a black account and your occupation is consumables. This is the Black Tower, a man-eating magical industrial machine. Facing mages and ferocious monsters who are capable of destroying the world at every turn, Zhou Yang, a former warehouse tallyman, has only the survival instinct he has honed by working at the bottom. Can't understand the spell? It's like sorting express delivery, sorting and filing the runes according to their shapes. Can't afford the potion? Then pick up the usable residue from the waste pile and purify it yourself. Can't learn magic? Then use a stupid way to practice an action 10,000 times until the muscles form a memory. This is a story about "accumulation". There was no one step to the top, just a -2500 calorie deficit, discarded parchment hidden in the soles of my shoes, and all the struggles a mortal would do to stay alive. "The end of magic is not a miracle, but thousands of calculations and practices."