Fang of the Spire King

The Fang of the Spire King is a rapier, granted as a boon by Zehir to those who would reseal Uk'otoa.

Description
The Fang of the Spire King is a rapier that is finely carved, with a snake motif. It feels exceptionally light and quick to the wielder.

The sword has a +3 bonus to attack and damage rolls. When activated, it grants advantage on attacks, and deals an additional 1d10 force damage.

History
After Uk'otoa was unleashed in the temple of Zehir, Zehir, speaking through a statue, demanded a pact of one of the Mighty Nein to ensure they were honest about their intentions to go after Uk'otoa. After Fjord made the pact, Zehir had him answer if he would rather embrace the shadows or climb the mountain. Upon Fjord answering the mountain, the statue of Zehir shattered, revealing the hilt of the Fang of the Spire King. Fjord picked it up and offered it to Kingsley, who took it. Kingsley equipped the sword in combat against Uk'otoa, rather than using his Acheron Blade.