The DEMMAU01.ITM is an undroppable item in the main hand weapon slot of certain Maurezhi creatures found in Watcher's Keep Elemental Level and the Baldur's Gate II: Throne of Bhaal.
The weapon is a magical and +3 Enchanted item regarding what it can strike.
A successful hit inflicts 1d6 Slashing damage, with speed factor of 0, and a reach of 1. It is modified by Strength to include THAC0 and damage.
Each hit exposes the target to a Paralyze effect. A Saving throw vs. Death will negate. The effect bypasses Magic resistance and spell protections such as Minor Globe of Invulnerability and Spell Trap.
The item has no other abilities or powers.