a GUI that allow the user that makes a item/block to add custom value enchants, and attributes i think its called (UNBREAKABLE, Hide-enchants, more)

Feature request by crazy pump#8295

A small list of features:

• Custom stack sizes (general category)
• ItemFlags (bu): https://hub.spigotmc.org/javadocs/bukkit/org/bukkit/inventory/ItemFlag.html
• Attributes: https://minecraft.fandom.com/wiki/Attribute#Attributes