Usuno's Blade

Usuno's Blade is an enchanted ninja-to +4 which has 10% chance to deal 2d10 points of electrical damage upon every hit. Damage from this effect can be halved by making a successful save vs. spells. This weapon deals 1d8 +4 points of slashing damage, has -4 THACO bonus, a pssed factor of 0 and it weighs only 1 lbs. This item appears in Baldur's Gate II: Throne of Bhaal and Baldur's Gate II: Enhanced Edition.

It can be found somewhere on the first floor of Watcher's Keep.

In-game description
"The daughter of a high ranking official within the bureaucratic society of Kara-Tur, Usuno rejected her family's station and carved a legend for herself among the Yakuza of the underworld.

The blade of this enchanted ninja-to crackles with electrical energy."