Korose, Kamishini no Yari

is a technique of Gin Ichimaru's Bankai, Kamishini no Yari.

Description
The true ability of Kamishini no Yari, as well as its deadliest aspect, is not its length or speed, but rather its ability to turn into dust for just a second when it expands out and contracts, for there is a deadly poison inside the blade which dissolves and breaks down cells. Gin can leave a sliver of his Zanpakutō in an opponent when he retracts Kamishini no Yari, allowing him to kill an opponent at any time by uttering the technique name while placing his hand up to the target. This causes the target to completely break down and dissolve at the cellular level from the inside out.