The Chu Family disciples practice thirteen types of sword techniques.

Almost everyone trains in the first twelve techniques, ranging from Yuan Grade, Mystic Level to Treasure Grade.

Only the Heavenly Chu Thirteen Swords, created by the Chu Family's ancestor, is a true Soul Grade sword technique.

This sword technique is extremely peculiar, with each move accompanied by an enigmatic mantra, leaving practitioners baffled and clueless on how to train.