Crossbow of Affliction

Crossbow of Affliction is an enchanted light crossbow +4 which gives the user a -4 bonus to THACO and +4 bonus to damage to all bolts fired from this crossbow. However, this weapon has a weight of 9 lbs, which means its 2 lbs heavier than the standard light crossbow. The weapon itself has one disadvantage, it lowers Strength by two points. This weapon has a speed factor of 6 and it fires one bolt each round. This item appears in Baldur's Gate II: Shadows of Amn and Baldur's Gate II: Enhanced Edition. It's not known where this item can be found.

In-game descriction
"Crossbow of Affliction +4 A devastating weapon, this crossbow unfortunately draws its power directly from the wielder. Some bowmen have used it regardless, and many to great effect, but the drawbacks must be carefully considered. Its most famous owner, Guil de Lyons, made good use of it fighting bandits in remote areas of Faerun, but he ultimately fell when he lacked the strength to defend against a rare assailant that got within striking distance."