http://www.magatsu.net/zanpakuto/blog.php [magatsu.net]

heres mine

herio's Zanpakutō:
When herio unseals Ethereal Bone Waterfall with the command "Break!" it transforms into a magnificent, substantial hurlbat which hovers in the air nearby, and inflicts wounds that will not stop bleeding unless covered with earth or mud, like a river can not be stopped unless dammed.

Aidan unseals this zanpakutō with the command "Thrive, Butterfly like Rain!" It resembles a square, light set of brass knuckles which extends to the elbow and enhances the wielder's sense of touch.