Mending Altar adds a redstone-powered repair altar that can store player experience and use it to repair damaged gear. Players can deposit and withdraw XP through a simple GUI, place equipment into the altar, and activate repairs with a redstone signal.
The altar stores up to 100 levels of experience, preserves its stored XP and inserted item when broken, and visually shows its powered state with a small redstone torch on the model. It also displays the inserted item on the altar while repairing.