The Warband Stash is a gameplay feature in Diablo Immortal.
Each Warband has a stash where items from Sealed Warband Chest can be delivered. Players can borrow items from the stash. The warband leader may set requirements on the items that can be put into the stash. Any items not meeting the requirements are placed into players' inventories, or if already in the stash, they are removed and sent back to their original owners via mail.