No enchantment needed, no XP spent - just carry the Wrench and it quietly keeps your gear in shape while you play.
Every 2 seconds, the Wrench scans through your gear - every equipment slot first, then your full inventory - looking for the first damaged item it finds, and repairs it by 1 durability point. It stops at the first damaged item per tick rather than fixing everything at once, so heavily-damaged gear gets fixed gradually rather than instantly, and the tool doesn't need to know or care what item it's mending.
Also covers: gear tucked into CoK Wings' wing slot and CoK Artifacts' extra equipment slots - the Wrench checks those too, not just the vanilla armor/hand slots and main inventory.
Where it works: anywhere in your inventory - it doesn't need to be in your hand or a hotbar slot, just carried.
Right-click an Iron Golem to heal it 10 HP instantly - plays an anvil "clink" and a burst of heart particles so you know it landed. No cooldown, no durability cost, and no limit on how many times you can use it on the same golem - top it all the way back up if you need to.