Fulminating SpearWeapon 7
Source Pathfinder #170: Spoken on the Song Wind
Damage 1d6 Piercing
Type Simple
Price 360 gp
Weight 1 bulk
This +1 striking returning spear is warm to the touch. The head of the spear is crafted from gold with ivory inlay and has a ruby set into the shaft. You can make the spear glow like a torch or suppress its light by using an action, which has the concentrate trait.
Activate 
envision, Interact
Frequency once per day
Effect You touch the ruby and hurl the spear at a square within 40 feet. When the spear lands, it detonates, dealing 6d6 fire damage (DC 23 basic reflex) to all creatures in a 10-foot emanation. It then flies back to your hand.
Traits
Something of uncommon rarity requires special training or comes from a particular culture or part of the world. Some character choices give access to uncommon options, and the GM can choose to allow access for anyone. Less is known about uncommon creatures than common creatures. They typically can't be summoned. The DC of Recall Knowledge checks related to these creature is increased by 2.
EvocationEffects and magic items with this trait are associated with the evocation school of magic, typically involving energy and elemental forces.
FireEffects with the fire trait deal fire damage or either conjure or manipulate fire. Those that manipulate fire have no effect in an area without fire. Creatures with this trait consist primarily of fire or have a magical connection to that element.
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.
ThrownYou can throw this weapon as a ranged attack. A thrown weapon adds your Strength modifier to damage just like a melee weapon does. When this trait appears on a melee weapon, it also includes the range increment.