Ancient ink kelp

Divination tortoise shell Immortal Gu feeds on kelp, specifically ancient ink kelp, a rank six immortal material rather than common kelp. The kelp is completely black like ink, and when its skin is torn it dyes the surrounding water pitch-black. ^{ch. 1314}

Fang Yuan intends to purchase and store ancient ink kelps in treasure yellow heaven to feed that Immortal Gu while short on funds. Many more sellers offer ancient ink kelps than divine deer fruits, but price keeps him from closing a deal at that time. ^{ch. 1314}