Golden scale

Fang Yuan takes a shiny golden scale from his immortal aperture and feeds it into black oil essence during Gu refinement. The golden scale is an immortal material pulled from a desolate beast golden dragonfish; together with black oil it makes the refinement immortal level. After deductions, he finds the golden dragonfish and black oil have a high level of compatibility. One scale is not enough, so he tosses in more golden scales while refining gather oil Gu. ^{ch. 1657}