Gin Ichimaru's Zanpakuto

Today I'll be talking 'bout Gin's Zanpakuto.

Shinsou 
God Spear/Sacred Spear

It looks like an ordinary wakizashi. The hilt is light-blue with a tsuba made of two slim swirls of metal looping around the blade to make an open oval, resembling an "S".  

Shikai : It is triggered by the phrase "Shoot to kill"(Ikorose).

Shinsō's blade glows white and extends at high speed to impale Gin's opponents from a distance. The blade also carries tremendous force when extending, as seen when Gin pushes both Ichigo Kurosaki and the giant Jidanbō out from under the Seireitei gate, despite the latter being firmly braced under it. Gin can maintain the extension and swing the activated Shinsō in wide arcs, attacking multiple targets quickly and simultaneously.

Kamishini no Yari

God-Killing Spear

 

Gin's Zanpakutō does not change in appearance at all, retaining its small wakizashi form. However, as Kamishini no Yari, the blade is capable of reaching lengths equivalent to 13 kilometers at 500 times the speed of sound. The blade can also retract to its normal size at the same rate.

Kamishini no Yari's true ability as well as its deadliest aspect is not based on its length or speed but rather its ability to turn into dust for just a second when it expands out and contracts. There is a deadly poison inside the blade that dissolves and breaks down cells. He can leave a sliver of his Zanpakuto in an opponent when he retracts Kamishini no Yari, allowing him to kill an opponent at any time when he chooses to by uttering the release command "Kill, Kamishini no Yari" (殺せ, 神殺鎗, Korose, Kamishini no Yari) for the technique, while placing his hand up to the target. The result causes the target to completely break down and dissolve at the cellular level from the inside out.

Butō

Dance (Step)

He firmly grips Kamishini no Yari with both hands and places the Zanpakutō's hilt squarely to the center of his chest, Gin is able to unleash the tremendous extension and contraction properties of his Bankai to an even more terrifying extent than its normal state. This occurs in the form of a piercing maneuver where the extension and contraction of the blade becomes almost completely-unseen to even the most-diligent of observers. 

Butō : Renjin

Dance (Step) Serial Blade

 

This ability repeats the action of extending and subsequently contracting Kamishini no Yari, as observed within the technique Butō, multiple times in rapid succession. The entirety of this process is completed in a mere moment, resulting in the individual steps involved in this technique becoming virtually indistinguishable from each other, generating an apparent mass of numerous blades that leaves little opportunity for the intended victim to evade successfully.