Mana Bow

Mana Bow is an enchanted longbow +4 which offers the wielder 20% resistance to magic and it has -4 THACo bonus. The bow itself weighs 2 lbs and it has speed factor of 3. This item appears in Baldur's Gate II: Shadows of Amn and Baldur's Gate II: Enhanced Edition.

Ìt can be found in the area which needs to be accessed to enter Suldanessellar. At the northeastern section, there is cave, which contains some Kua Tor, They guard this bow. This bow can also be found somewhere else.

In-game description
"Mana Bow +4 Kestsa was given this longbow many years ago by the Cowled Wizards, as reward for his exemplary service in the Athkatla city guard. He was tireless in bringing to justice those who unlawfully used magic. The bow served him well in his cause, granting resistance to damage from arcane energy."