Larian Studios Forums Divinity: Original Sin 2 - The Modding Dungeon Divinity - Original Sin 2 - Modding Scripting Configurable Items Help

If you change the OnUse property of the item to "Send an event to Osiris", the "use" option will become available in the right-click menu and when a player uses the item, you will get a CharacterUsedItem event in story for that item and the player that used it.