Way of the Empty Palm

Acquisition
Signet of Capture
 * Ilidus of the Empty Palm (Boreas Seabed (explorable area), not during The Halcyon Job)
 * Senkai, Lord of the 1,000 Daggers Guild (Boreas Seabed (explorable area), only during The Halcyon Job)

Trivia

 * The Japanese words for empty (kara) and palm (te) bring us the word 'karate'.