Antitoxin Beacon

You emanate an aura in a 30 foot radius around you that absorbs and neutralizes toxins. All creatures in the area are immune to the poisoned condition and resistant to poison damage. If a creature that enters the area has the poisoned condition, its condition ends.

If a creature starts its turn in the aura or enters it for the first time on its turn, and it has a natural weapon that either deals poison damage or inflicts the poisoned condition, it must make a Constitution saving throw. It takes 4d6 necrotic damage on a failed save and half as much on a successful one.