Hundred Blades

Acquisition
Signet of Capture:
 * Tyria
 * Spoiler-related Boss, see below (Hell's Precipice)
 * Cantha
 * Warrior's Construct (Sunjiang District (Mission))
 * Warrior's Construct (Sunjiang District (Explorable))

Related Skills

 * Attack skills that hit multiple targets
 * Cyclone Axe
 * Triple Chop (Elite)
 * Crude Swing
 * Barrage (Elite)
 * Attacks that hit multiple times
 * Sun and Moon Slash
 * Dual Shot
 * Critical Strike
 * Twisting Fangs
 * Blades of Steel
 * Exhausting Assault
 * Horns of the Ox
 * Nine Tail Strike
 * Death Blossom

Prophecies Acquisition (Spoiler)
Signet of Capture:
 * Tyria
 * Undead Prince Rurik (Hell's Precipice)

Factions Acquisition
Signet of Capture:
 * Sunjiang District (Mission), or Sunjiang District (Explorable) after mission has been completed:
 * Warrior's Construct