The Dead Shot

This longbow is quite powerful artifact in the game and is obtained as a drop from a named hobgoblin elite at the end of chapter three.

In-game description
"Long bow of marksmanship: 'The Dead Shot'. Driven by years of rivalry, the Dukes of Spandeliyon and Delthuntle decided to organize a private contest of that would proclaim the better archer between them. Both boasted the power of their magical bows, but that wasn't enough for Edwall Dest, Duke of Spandeliyon. He arranged for the theft of his opponent's bow, and on the day of the contest, he couldn't help but gloat at his advantage. The Duke of Delthuntle, known only as Raymond, demanded a demonstration of Edwall's skill on a scarecrow that he had placed. Edwall Dest drew his longbow and released the arrow with determination, not stopping to think how uncannily the target resembled himself. The missile split the large voodoo doll's head in twain and at that moment Edwall's head did much the same."