Soul Bound

A specific ability set into Items, Weapons/Armor, Quest Items, and Treasure Equipment that links said item to your Byond Key. Once an an object is soul bound the item cannot be passed to, used or equipped by other players and can only be used by characters under your Byond Key account. However, these items can still be passed to other characters under your same Byond Key or sold to shop vendors, with the exception being quest items.

An example would be if you had a Burning Blade and had used it on your Ranger. You could still put it in your Shared Vault if you are a subscriber, then switch to your Soldier or Merchant and equip the weapon to that character after getting it into his inventory.