"Because of the Soul Killing Chains," Zhou Yan could now qualify to refine the Heavenly Heart Secret Realm if he comprehended this ancient Supreme Dao.
However, the Heavenly Heart Secret Realm is after all a remnant of an ancient realm, and the Yuan Ci Secret Realm was considered somewhat lower in level; refining it required prevention against backlash, which was another reason why some Saints dared not to refine it. But Master need not worry—Bai Ying here still has the Thunder Flame Soul Liquid. When the time comes, using the Thunder Flame Soul Liquid to derive and suppress the secret realm's fractured souls with Void Thunderflame will smooth out the devouring process.
Of course, this is under the premise that Master first properly refines the Yuan Ci Secret Realm."
Bai Ying explained.
