it works as th

mycomancer once tried to fuse a beanie with a mushroom via hot temperature/melting

The Mycomancer has a giant underground mile-wide library of potions. The shelves stretch for an entire mile and are as tall as a building. It is confirmed that he does not use any of the potions down there because he saw a spider once.

already half canon
he does have a shitload of elixirs, but not exactly a library
also he welcomes spiders because they'll eat any pests that try to eat the fungi

aw man