Gu Mu

慕 骨

He is the honorable elder in the Hall of Souls who took Han Feng's Sea Heart Flame. People call him Old Mu Gu. His position in the Hall of Souls is quite high because he is a genuine tier 8 alchemist on top of being a Dou Zun, and he is much valued by the hall chief of the Hall of Souls. (Source: Battle Through the Heavens Wiki)