weapon enchantments that can only be found exploring

there are so many things I'd like to be able to do with my weapons but balancing that out is difficult. I wanna dual wield, I wanna be able to throw my axe, etc. These ideas are usually turned down because of the way people suggest the are implemented well my idea is to do it through enchantments, and just a balancing reason the enchanted books/weapons can only be found

as for the additional details of the enchantments dual wield could require both swords to have the dual wield enchantment or just one to have it (the one for the offhand slot). perhaps the enchantment for additional balancing reasons could decrease damage of the blade its one but make up for it by having two blades and increase swing/spam-ability

if there were multiple tiers of this enchant it could have its damage decrease lessened. additional balancing would of course be allowing what other enchants can also be put on when this enchant is applied

as for the throwing axe enchant it would act much like the trident, though i can see additional secondary enchant to complement it. like cleave, which would break wooden blocks it hits but consume more durability, freeze and flame would create ice on water it touches, or fire on blocks/mobs it touches. just something to complement throw-ability much like channeling with tridents

there are so many unique ways these ideas can be implemented i just dont want to see them rot away