It can be difficult for a demon spiritualist to break through the bottleneck in Silver rank. The Miracle Meridian Hands. acupuncture method can be used to force it quickly. The process would involve sealing the blood vessels. One would seal thirty-six acupuncture points and trap their soul force within their Soul Realm.
This way of breaking through, aside from exhausting large amounts of soul force, would also slightly damage the meridians. Because of this, no one would use this kind of method, unless they have absolute confidence in their acupuncture knowledge.