2nd ingredient slot for enchanting table, which determines the enchantment

There should be a way to choose specific enchantments by exploring more rather than relying on random enchants system currently or villager trading. Certain enchants depends on what element you put. (Like in brewing potions.)

Requirements:

-Lvl 30.

-Tables able to cast lvl 30 enchants.

-Book form only.

Which examples of ingredients? Flints for sharpness, magma cream for fire protection, prismarine shards for impaling. Etc...

What are the downsides? One granted enchantment per book. You cannot choose mending, frost walker and soul speed.