A wasted cultivation cultivator, whose senior sister comes to his door asking for pills at the start

Ye Yun, who was of low talent, was responsible for guarding the abandoned alchemy room of the ancient holy land, but he unexpectedly awakened the Creation Furnace!
Simply put in waste pills, and they can be transformed into top-grade pills!
Aloof senior sister? Conquer her with elixirs!
A swordswoman? Conquer her with elixirs!
A female demon empress? And she conquered her with elixirs!
So what if I'm not naturally gifted?
So what if you don't have a background?
Watch me become an immortal by taking drugs!