This is a small guide about how the lapine upgrade boxes work.
Some of you might ask, 'what is this Lapine Upgrade Box thing?'. This guide will show the mechanics of these items with the https://www.divine-pride.net/database/item/23100/gunslinger-scroll and the https://www.divine-pride.net/database/item/19157/drooping-gunslinger-1 as example. I might add a guide for the Lapine Ddukdak Box as well.
If you have a Gunslinger Scroll in inventory and use it a new window will show. The scroll is not consumed until the upgrade is completed.
The item list on the left will show all targetable items. The items might be restricted in a minimum upgrade level or amount of card slots or random enchants. You can drag & drop the item to the left side.
The second button will become active. If you press it the upgrade/enchant will be done and the Gunslinger scroll will be consumed. The result should be automaticly visible. Here are some examples.
The item might be enchanted with specific random enchants related to the type of upgrade box or it might get refine levels. The exact effect should be declared in the item description of the box. https://www.divine-pride.net/database/item/100271/ancient-hero-weapon-9-refine-permission
Some boxes also might have a failure chance of upgrade. If it fails there also might be a "failure" item as replacement of the destroyed item.
I think some of the upgrade boxes can be bought with daily rewards tokens of episode quests. Others might be only accessible during events or cash shop.