Unique tools, enchantments and relics to make playthroughs unique

There would be a new type of enchantment, that is found exclusively as books in structure loot very rarely. They'd be mutually exclusive, and the goal would be that you only find a few each world, and only use one, giving a little bit more uniqueness to every world. For example, along with sharpness, which they'd be compatible with, the sword could get rare enchants that boost damage to nether, flying, riding and ridden mobs or illagers. Bane of Arthropods and smite would join these, though quite reduced in power. Also, weapons and tools could be found with even rarer enchants that give them special, unique abilities that change how they work, similar to the riptide, channelling or sweeping edge enchants. Rare abilities would be activated with right click and be very powerful, but hard to obtain, and even harder to find a specific one. They could light mobs around on fire, allow you to charge two arrows at once, deflect projectiles straight back, fire projectiles, let a flint and steel start fire that never goes out etc.