Purple Worm Toxin is a very rare type of Coating that can briefly coat a weapon in a potent poison to deal extra damage.
If the poison is potent enough, even the smallest pinprick can fugue the brain and turn the capillaries to shrivelled tubes.
Properties
Potions
Single Use
Rarity: Very rare
Weight: 0.2 kg / 0.4 lb
Price: 10 gp
Effect
- Coat your active weapon for
Duration: 10 turns with toxin that deals an additional damage when attacking.
1d10 (1~10) 
Poison - On a successful
Constitution saving throw, target still takes half damage.
Where to find
Can be crafted via the Alchemy system by combining Suspension of Purple Worm Slime procured from Purple Worm Gullet and any Vitriol