Xp Cost

This mod bascially shows xp and use count of enchanted items by holding L-Shift or L-Ctrl. This can be very helpful in modpack with a lot of enchants and not knowing enchantments level costs. It can easily speed up anvil combination process. This also works on items/books with multiple enchants on them.

Level cost isn't showed if the item doesn't have enchants.
Use cost doesn't show up if it hasn't been combined before.

This will cost 29 Level to apply to an unenchanted weapon

Second feature is (if enabled in config) show dropped enchanted books and enchanted items enchantments so you don't need to pick them up to check individual item. Books are yellow border and Items are aqua borders. You can also configure the keybind that shows the tooltip in Controls