Mending is nice and all... But what if there was a custom enchant that allowed you to use stored exp to mend tools? It can take more exp the lower level it is (to mimic inefficiency, and uses at minimum 1.5x the normal exp that normal mending would take) and would be a rather rare level 30 enchantment. This could be super useful for long-term exploration, and would add a whole new use to exp! TL;DR - Add a new custom enchant like mending that uses stored exp
