Void Branch
Void Branch is the sword of a Xixian princess that nullifies all nearby magic and cleaves through both sorcerous and physical defenses with ease[1].
Appearance
Void Branch is intensely black and has a broad curved blade. It is unknown whether its coloring is a result of the material of the blade or a sorcerous effect. It emits a visible aura of sorcery[1].
History
Void Branch was initially owned by a Xixian Princess, who used it until her defeat in the siege of Velthryn in 2730VF. The Thornguard captain who helped force the princess into retreat and recovered it after the battle passed the Void Branch down through his family, until their ancestor sold it in order to cover gambling debts, after which it was stolen by a master thief[1].
After Kyestri recovered it from the master thief failed to steal from his vault, it remained with him up until the events at the end of Defying Destiny, when it was looted and put into the Jaden Box[2].
When the Jaden Box is opened in On the Shoulders of Titans, it is not mentioned, most likely given to Taelien later, as it was previously arranged that he would get "all the swords"[2][3].