User blog comment:Zathronas/Speculative author: My top 13 Questions for Volume 3/@comment-78.42.186.25-20141025154550/@comment-67.1.120.162-20141026011232

think they meant are there any martial arts that focus on using aura more than (or rather than) weapons. Seemed like Ren might have studied such a discipline based on how he killed the Taijitu in vol 1,  but nothing definite was mentioned