The possessor is an item in the game that acts as a legal bot system. It is not a one time use item and can be configured for different tasks. This item is time limited and the time starts to count down once activated. The item seems to be bound on pickup.
How to useEdit
Put the item in your bag. If you have a Jadeon of Soul then you can use this to configure the device to auto loot mobs. You will be able to use Health and Mana Potions. Spells and different attacks.