Custom Enchanting System
PrometheumMC features EcoEnchants, a plugin which drastically expands the amount of enchantments present in the game.
Each enchantment has a different rarity, meaning that it will be less likely to show up in villager trades or in enchanting table trades.
Only 1 Special or Very-Special enchantment can be on each piece of gear at the same time, and you can only have 13 enchantments on a single piece of gear as well.
Although the anvil will say that an upgrade is Too Expensive!, it will still let you perform the upgrade provided you have enough levels. The required amount of levels to do so.
There are Fabric mods that let you see the required levels, but the server has no vanilla way to tell you.
Enchantment extractors can be used to take an enchantment off of an item, including curses.
Currently due to an exploit, Extractors only work on items without CMD (Custom Model Data) so any item that has a custom texture will not work. This will be fixed in the future.