Four Symbols Black Tortoise Formation Flags
Origin
Ancient formation flags prepared by Xuan Gu to trap the Nine-song Spirit Ginseng.
Effects & Usage
A set of four small yellow flags. When arranged, they can form the Four Symbols Black Tortoise Formation, which can harden the earth and stone within a several dozen zhang area, preventing the ginseng from burrowing away. Xuan Gu has a control flag to manipulate it.