Serpent Shaft

Serpent Shaft is an enchanted quarter staff +2. It deals 1d6 +2 points of crushing damage, it has -2 THACo bonus, a weight of 3 lbs and a speed factor of 1. In addition, this weapon has 50% chance to poison opponents hit by this weapon, who fail their save vs. poison. It will deal 2 points of damage every second, lasting one round and deal 12 points in total.

This item appears in Baldur's Gate II: Throne of Bhaal and Baldur's Gate II: Enhanced Edition. It's dropped by one of the creatures on the fifth floor of Watcher's Keep. This weapon is required to upgrade Ravager to +6 by Cespenar.

In-game description
"Adorned with serpentine designs, this powerful quarter staff has a chance to release a lethal toxin against its opponents with every blow."