Shinwonryu

Shinsoo Black-Hole Sphere (신원류, sin-won-lyu) is a Shinsoo Manipulation Technique which can only be mastered by "Those who have opened the door" (most likely the Irregulars or some of them).

Alternative Translation

 * Origin style
 * Zumisumi expands of a plausible play of words.
 * Source of Shinsoo
 * Godly Circular Flow