Quivering Blade

Acquisition
Signet of Capture:
 * Sun, the Quivering (Wajjun Bazaar)

Note: if you're friendly with the Am Fah (by doing the Bujo quests in Kaineng), Sun is not hostile towards you. You must complete all of Bujo's quests to then get A Monstrous Revelation from Imperial Agent Hanjo in Kaineng Center. While doing this quest, Sun will spawn. Everyone in your party must have completed all of Bujo's quests for him to spawn during A Monstrous Revelation. If finished all of these quests be sure to complete Brother Torsai's quests as well so that the Am Fah are not friendly with you.