Refinement Path

Throughout history, refinement path had two styles. The first was the hairy man nature Gu refinement method, which used nature and dao marks to refine Gu, with Limitless Demon Venerable’s use of Gu worms to refine heaven and earth as its opposite. The second was the human isolation style. Ni clan’s Gu Immortal, the refinement path quasi-supreme Ni Ren, used humans to refine Gu and implanted Immortal Gu in Ni clan bloodlines, with methods that use Gu to refine human as the opposite side of that style. Fang Yuan evaluates that the depth of refinement path supreme grandmaster should likely comprise those four aspects, and that after Human Sea and Limitless Demon Venerable’s arrangements he still needs to finish comprehending using Gu to refine heaven and earth. ^{ch. 2168} A Thieving Heaven true inheritance portion adds refining fake Gu as a further refinement path aspect beyond those four. ^{ch. 2178}

Fang Yuan is a refinement path venerable, and refining Immortal Gu is extremely easy for him at that stage. ^{ch. 2250}