Repair allows you to use an iron block to repair armor and tools.
Repair tools or armor using the mcMMO Anvil. This is an iron block by default and should not be confused with the Vanilla Minecraft Anvil.
Place down a mcMMO Anvil and right-click to repair the item you're currently holding. This consumes 1 item on every use.
Repair Mastery increases the repair amount. The extra amount repaired is influenced by your Repair skill level.
Super Repair is a passive ability. When repairing an item, it grants players a chance to repair an item with double effectiveness.
This passive ability allows you to repair items with a certain chance of maintaining its enchantments. The enchants may be kept at their existing levels, downgraded to a lower level, or lost entirely.