Serpent Fang Toxin is a Consumable(Coating). It can be applied to a weapon to give it special properties for ten turns or thrown as a Grenade to inflict its effects in an area.
From political assassinations to marital dysfunction, poison's got you covered.
Properties
Single Use
Rarity: Uncommon
Weight: 0.2 kg / 0.4 lb
Price: 10 gp 
UID
CONS_Poison_Serpent_Venom
Effect
- Coat your active weapon with poison for
Duration: 10 turns
- Inflicts
- Duration: 1 turn
Constitution saving throw: DC 13 to negate
- Inflicts
Throw the poison.
Range: 18 m / 60 ft
Creates area: Serpent Venom.
- AoE: 1 m / 3 ft (Radius)
- Duration: Permanent
- Inflicts
- Duration: 1 turn
- Area can be used to dip weapons.
- Duration: Until Long rest
- Constitution saving throw: DC 13 to negate
Where to find
Can be crafted via the Alchemy system with Suspension of Snake Venom procured from Venomous Fangs and any Vitriol