Blade of Searing

Blade of Searing is an enchanted bastard sword +3. The only difference between this weapon and a generic Bastard Sword +3 is that this weapon deals 1 point of fire damage. The weapon deals 2d4 +3 points of slashing damage, has -3 THACO bonus, a speed factor and a weight of units. This item appears in Baldur's Gate II: Shadows of Amn and Baldur's Gate II: Enhanced Edition.

This weapon can be acquired from defeating a drow in the tavern of Ust Natha

In-game description
"Blade of Searing, Bastard Sword +3 The benefits inherent in this sword are plain to see; it is exceptionally accurate, and a lick of flame follows every blow, searing the target in addition to the normal damage received. It is an efficient troll-killer, though it has not yet been heralded as such in song or legend."