Orner's Venomous Crossbow

Alter: This magic crossbow carries a small system of curious tubes and vessels. You gain a +1 bonus to attack and damage rolls made with this magic weapon. The crossbow has 4 charges and reagains 1d3+1 charges daily at dawn. You can expend 1 of the weapon's charges when you make an attack with it to coat the fired bolt with a unique, self-generating venom. If the attack hits, the target takes an extra 1d6 poison damage and must make a DC 13 Constitution saving throw. On a failed save, the target is poisoned until the end of its next turn.

If you expend the crossbow's last charge, roll a d20. On a 1, the vessels attached to the crossbow shatter and spray poison in a 20 foot radius sphere centered on your location. Creatures within the sphere take 1d12 poison damage and must succeed on a DC 15 Constitution saving throw or be poisoned for 1 minute. When this happens, the crossbow ceases to be magical and loses all of its additional properties.

Attunement: Yes
Rarity: Uncommon
Type: Hand Crossbow
Cost: 330gp

Griffons Saddlebag, Vol II

sold at Circus of Value