Bastard Sword +3

Bastard Sword +3 is an enchanted weapon which inflicts 2d4 +3 points of slashing damage and it has -3 THAC0 bonus. The weapon weighs 7 lbs and it has a speed factor of 5. This item appears in Baldur's Gate II: Throne of Bhaal and Baldur's Gate II: Enhanced Edition. It's sold at the Tankard Tree and the merchants Carras and Karthis al-Hezzar sell this sword.

In-game description
"Also known as the hand-and-a-half sword, the bastard sword derives its name from the fact that it is halfway between the two-handed sword and the long sword. This is a magical bastard sword."