Viper ArrowConsumable 4
Source Pathfinder Core Rulebook
Price 17 gp
Weight negligible
Activate 
Command
The shaft of this arrow is covered in fine green scales, and its iron head comes to a pair of points almost like fangs.
After an activated viper arrow hits a target, the arrow transforms into a Viper. The target is affected by the viper's poison, as if it had been bitten. The viper then lands in an open space adjacent to the target.
The viper has the summoned trait and acts at the end of your turn, even though you didn't use the Sustain a Spell action. It is under the GM's control, but it generally attacks the creature the arrow struck. The viper vanishes after 1 minute or when slain.
Craft Requirements Supply one casting of Summon Animal
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.
ConjurationEffects and magic items with this trait are associated with the conjuration school of magic, typically involving summoning, creation, teleportation, or moving things from place to place.
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.
MagicalSomething with the magical trait is imbued with magical energies not tied to a specific tradition of magic. A magical item radiates a magic aura infused with its dominant school of magic. Some items or effects are closely tied to a particular tradition of magic. In these cases, the item has the arcane, divine, occult, or primal trait instead of the magical trait. Any of these traits indicate that the item is magical.