Notice of White Scroll Removal

Shield scrolls are the cash shop equivalent of white scrolls, except you have to drag the scroll onto your item as opposed to the pop up when you have a white scroll in your inventory.

Actually there were (formerly tradeable, probably made untradeable along with Mchaos and epic pots) Use-slot Shield Scrolls. Back when dupes were everywhere, some hacker brought over stacks of shield scrolls to Khaini but there wasn't really a reason to use them over WS.