Ok, so this is just taking the idea of "Uncaring Master" one step further. If the dog is just a tool, which you can rebuild later, it only goes to reason that eventually, an uncaring master is going to plant explosives in his dog. (Note, this does not come in a form that would work for Druid Dogs)

Item Type: Docent
Race Absolutely Required: Warforged/Artificer Defender
Min Level: 8

This docent is build containing a dead-man's switch inside, connected with high explosives. When the bearer of this docent is destroyed, an explosive charge of 10d(Min Level of the Docent) is activated, affecting a standard AoE radius, and potentially blinding those in the area of effect (Reflex Save equal to 10+Min Level of the docent).

Purple Augment: (Pre-slotted with Heavy Fortification)

Green Augment: (initially empty)

(note: the damage and reflex saves are based on the item's min level. This min level can be increased using higher-powered augment slots, making this potentially useful at higher levels as well)