Asphyxiating Charge: this round is filled with a green liquid, it explodes upon impact, filling a 30 ft radius with a noxious green gas. All creatures in this radius must succeed a DC 15 Con saving throw or take 4d6 poison damage and are poisoned for 1 minute. On a success the creatures take half damage and are not poisoned. Creatures who fail can attempt another Con save each round on their turn.
Proficiency with a Dart allows you to add your proficiency bonus to the attack roll for any attack you make with it.
This weapon has the following mastery property. To use this property, you must have a feature that lets you use it.
Vex. If you hit a creature with this weapon and deal damage to the creature, you have Advantage on your next attack roll against that creature before the end of your next turn.
Notes: Poisoned, Finesse, Thrown, Vex