Grindstone

Grindstone

Pick what to do. Nothing happens until you pick a row, so a shift-click can't strip an item by accident.

Put in	Pick	Result	Cost
an enchanted item (or a book with several enchantments) + plain books	Extract one enchantment	the enchantment moves onto a book; the item keeps everything else	XP levels, as if adding it (Efficiency V = 5, Mending = 2)
a cursed item	Cleanse one curse	that curse is removed	at least 30 levels (see below)
an enchanted item	Disenchant	vanilla: non-curse enchantments removed, XP back	gives XP
two of the same item	Repair	vanilla: combined and disenchanted, XP back	gives XP

The list beside the slots shows each action with its price. Click a row to pick it, again to clear it; putting in a different item clears it too. The price of the pick is shown where the anvil's cost label is.

Extract

• The enchantment is moved, not copied. It can never end up on both the item and the book, or on neither.
• One plain book per extraction. The books can go in either slot.
• Curses can't be extracted (they're listed but refused). Remove them with Cleanse.
• A book holding only the picked enchantment is refused (there's nothing to split off). A book with that enchantment and a curse can be split, which separates the curse.

Cleanse

Removing a curse repays the discount it gave: the cost is the curse's own discount percentage of what the item's other enchantments would cost to add, with a minimum of 30 levels (curses.removal_min_cost). Without that, "add a curse, enchant cheaply, remove the curse" would be a free discount. See Costs.

Extract and Cleanse respect the server's "Too Expensive!" cap. Creative players bypass it.