The Poisoner's Ring is an uncommon Ring that allows the wearer to cast Virulent Venom.
Strange, green fumes seep from the ring's emerald.
Properties
Rings 
Rarity: Uncommon
Weight: 0.05 kg / 0.1 lb
Price: 40 gp 
UID
MAG_Poison_PoisonLethality_RingUUID
c4f364cc-daa1-4783-a474-b7ff394d2157
Special
The wearer of this item gains:
: Point your ringed finger at a target to make it vulnerable to Poison damage, unless it is immune to Poison damage. (
Recharge: Long rest)
Where to find
Act Two: Sold by Roah Moonglow in Moonrise Towers.