Confirmed — there was genuinely no way to apply a White Scroll. It now works the way the original does: it is consumed together with the scroll you are applying and stops the item being destroyed if that scroll fails. Leaving IN PROGRESS until you have actually booked a failure with one held and confirmed the item survived, because that is the only outcome that proves it. Re-test by scrolling something you do not mind losing, with a White Scroll in your bag, until a failure lands.

Closing this - Mark's v54 pass confirms a White Scroll is consumed alongside the scroll and saves the item when the scroll fails.

You were right that there was no way to use it. The White Scroll (2340000, Cosmic ItemId.java:154) is not an upgrade scroll and carries no scroll target, so it never matched anything the scrolling path recognised. It is a per-APPLICATION choice, not a property of the scroll: the real client sets bit 0x02 on the SCROLL_EQUIP packet and Cosmic reads it back in ScrollHandler.java:56-63. That opt-in now exists.

Two details worth knowing when you re-test:

- It is resolved AFTER every other gate, so a scroll that gets refused for any reason never eats one. Choosing it with none in your bag is not an error either - Cosmic quietly drops back to normal scrolling (ScrollHandler.java:92-97) and so do we.
- What it protects is the SLOT, not the item. v83's own description says so: "the number of item upgrade slots will not be deducted if the scroll fails. However, if using a Dark Scroll, there is still a chance that your weapon will be destroyed." A White Scroll will not save you from a boom. It also does nothing on a Clean Slate, which spends no slot to begin with.

LIVE on the published build.