Skull BombConsumable 8
Source Pathfinder #180: The Smoking Gun
Price 80 gp
Weight light
This device is a human-sized skull crafted entirely from metal plating and clockwork gears, which slots easily into a human skeleton in the spot where an ordinary skull would normally be located. While performing a Create Undead ritual, you can attach this skull bomb to the target creature in place of its own head. In order to do so, the target creature must be Medium and have the humanoid trait. The target creature can have only one skull bomb attached in this fashion. The creature gains the following ability.
Throw Skull 
(manipulate)
The creature detaches its skull bomb and hurls the volatile explosive at a point within 30 feet. The skull explodes, dealing 7d6 fire damage to creatures within a 15-foot burst (DC 24 basic reflex save). The skull is permanently destroyed and can't be used again, and the throwing creature is permanently Blinded and headless.
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.
ClockworkClockworks are intricate, complex constructs that can be programmed to perform specific functions.
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.
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.
NecromancyEffects and magic items with this trait are associated with the necromancy school of magic, typically involving forces of life and death.