Name: Shikyoyowakusuru (roughly translated Death whistle)
Looks: Normal looking Zanpaku-To, other than the fact that there are three holes in the hilt.
Shikai: Released by the command "Let your voice be their pain" air pockets open up on all sides of the blade and when the sword is swung, the air creates a humming sound in the air. This sound reaches the ears and utilizes the Eardrum and sends a painful message to the brain, nearly always causing death.
Bankai: Not released yet. (Will soon though.