The items that can be pierced include armor suits, and as of V12, also weapons and shields.

Piercing Tools

	Moonstone: Used to pierce an item to add empty card sockets to it.
	Scroll of GProtect: Used to protect your item from breaking during piercing attempts.

How-To

Follow these directions to pierce your item.

• If it is equipped, unequip it.
• Locate one of the Weapon NPCs, right click and select "Pierce".
• Insert the item that you wish to pierce in the first slot. This item must be an armor suit, weapon, or shield. (Note: Armor and Weapons droped by Clockworks can not be pierced.)
• Put a Moonstone in the second slot, followed by a Scroll of Gprotect in the third. (Note: Using a Scroll of Gprotect is optional, however if the upgrade fails and you do not use one, you will lose the item, even if it is the first piercing on it.)
• It will take a second to show if the piercing was a success or a failure. If it was a success, it will show a (0/#). The # is anything up to 4 for suits, or up to 10 for weapons and shields, which is the maximum number of slots you can add to each item.
• After the piercing takes place, you can insert one of the several different kind of Socket Cards. Inserting a Card into an existing slot always succeeds.

Now there is an available function that allows you to remove upgrades!