Black Adder VenomConsumable 2
Source Pathfinder Core Rulebook
Price 6 gp
Weight light
Adder venom is a simple but effective way to enhance a weapon.
Activate 
Interact (Injury)
Saving Throw DC 18 fortitude
Maximum Duration 3 rounds
Stage 1 1d8 poison damage (1 round)
Stage 2 1d10 poison damage (1 round)
Stage 3 2d6 poison damage (1 round)
Traits
Anything that doesn't list another rarity trait (uncommon, rare, or unique) automatically has the common trait. This rarity indicates that an ability, item, or spell is available to all players who meet the prerequisites for it. A creature of this rarity is generally known and can be summoned with the appropriate summon spell.
AlchemicalAlchemical items are powered by reactions of alchemical reagents. Alchemical items aren't magical and don't radiate a magical aura.
ConsumableAn item with this trait can be used only once. Unless stated otherwise, it's destroyed after activation. Consumable items include alchemical items and magical consumables such as scrolls and talismans. When a character creates consumable items, they can make them in batches of four.
InjuryThis poison is delivered by damaging the recipient.
PoisonAn effect with this trait delivers a poison or deals poison damage. An item with this trait is poisonous and might cause an affliction.