Vendor: CupriZone: Shattrath
Sold by Cupri, the TBC Timewalking vendor, for 1,250 x Timewarped Badge.
It turns your character into a male Broken (since no female Broken model truly exists), which uses the male Tauren animations and skeleton. It does not affect your character's sex, i.e.: going from "the Matron" title to "the Patron" title (male version). Sound effects were female Tauren for my female character; they probably are male Tauren for male characters.
Prior to Mark of the Ashtongue's addition to the game, there was only one item that transformed characters into a Broken. Ashtongue Cowl is associated with the attunement quest chain for Black Temple. It could only be used while on that quest and only while located in The Eye zone.
Hotfixes - October 1