Treasure Box contents can be shared with Squad members
Treasure Deal was a game mechanic in Xenoblade Chronicles X which allowed Armor, Weapons, or Augments received as battle rewards to be offered to other members of the Squad. When the Treasure Boxes dropped by an enemy after a battle were opened, the player may offer one of the contents as a Treasure Deal. If there were multiple valid Treasure Deal options, a player could choose to offer one Treasure Deal and then wait a few minutes to then enter and exit the Choose Items menu. After exiting the Choose Items, menu, if enough time has elapsed, a player may treasure deal another valid item. After the online shutdown, the Treasure Deal mechanic was discontinued. Though online gameplay has become possible again with the Definitive Edition, it longer includes the Treasure Deal game mechanic at all.
A Treasure Deal notice
Other players in the Squad, if they had the "Social Notifications" option enabled, would see a message with the name of the player offering the deal and the item being offered, and could press the Select (-) button if they were interested in that item. After a certain amount of time, one of the interested players would be randomly chosen to receive the item; if only one player expressed interest, that player would receive it. Players offering Treasure Deals received 50 or 100 BLADE Points depending on their division for each Treasure Deal offered regardless of any other player receiving it.
For each battle, a player could only choose one Weapon, Armor, or Augment to offer as a Treasure Deal. Materials and Holofigures could not be offered as Treasure Deals. After offering an item, there was a short delay before another Treasure Deal could be offered.