How to remove items from the Collection Book in Save the World?

If you wish to use an item you previously sent to the collection book, there is an option to unslot these items for a small amount of Legendary Flux:

1. Go to your Armory tab in Save the World.
2. Select the Collection Book.
3. Open the tab of the item you wish to unslot from the Collection Book.
4. Select the desired item,
5. Choose UNSLOT.
6. A window will show you how much Legendary Flux you need to unslot the item (some can be unslotted for free).
7. Choose:
   • PAY TO UNSLOT if it's not free.
   • UNSLOT if it is free.