Dual Hound
From Final Fantasy Wiki
The Dual Hound (デュアルハウンド dyuaruhaundo) kind of weapon which appeared in Final Fantasy VII: Advent Children. Simply put, the Dual Hound is a pile bunker designed to function as a stun gun, although it is still strong enough to shatter stone otherwise. The force of the Dual Hound is also able to create a wave of dirt when Loz slams (and presumably fires) it into the ground.
It is the main weapon of Loz, one of the remnants of Sephiroth who appear in Advent Children, and wears it attached to his left arm. He is perfectly capable of fighting without it, but it enhances his strength greatly. The handle of the Dual Hound can be retracted, and springs forward into Loz's hand through an unseen catch.
