Piercing

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.

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!