Jhor the Bleeder

Jhor the Bleeder is an enchanted bastard sword +2. This sword has -2 bonus to THACo and +2 bonus to damage and every hits inflicts 2 points of extra damage each round, up to total of 10 points. The weapon weighs 7 lbs and has a speed factor of 6. This item appears in Baldur's Gate II: Shadows of Amn and this item will probably appear in Baldur's Gate II: Enhanced Edition.

It can be found in the Underdark. One of the victims of the Imprisonment spells carries this weapon. The victim can be released by interacting with the thing.

In-game description
"Jhor the Bleeder, Bastard Sword +2 This blade belonged to Ho Mang, a traveler from Kara-Tur who accepted dubious service at court throughout Faerun. Skilled in "persuasion", he would use this sword to perform the "Death Of A Thousand Cuts", an ancient ritual from his homeland involving a lengthy series of small, painful incisions. The properties of the blade prevent blood from clotting, and the victim slowly bleeds to death. The sword was stolen, and its whereabouts have been a mystery until now."