UMBER02 is an undroppable melee weapon used by various Umber Hulk Elder creatures especially in the Baldur's Gate II: Throne of Bhaal part of the saga.
It is considered a magical and +3 enchanted item and deals 3d6 (crushing) damage (adjusted by Strength modifier), with a range of one foot, and speed factor of 1.
This item provides immunity to the status effect Confusion, as well as the animation played over the target. Any creature with this item as its quick slot melee weapon will be immune to those effects.