A cultivator's blood is an extremely valuable substance with all sorts of wondrous uses.
One such use is for tracking.
Xiao Chen had encountered such an item long ago: the Tracking Compass Elder Chen had given him.
By placing a drop of blood from one's fingertip onto the Compass, the user could locate other Compasses within a certain range.
It even worked when kept inside a Storage Bag, though the effective range would be slightly reduced.
However, for a master of the Blood Dao, these conditions were even more relaxed.
As it happened, the Eastern Wanderer was an expert at manipulating blood.
Before he even approached the cave, he had smelled the distinct scent of blood, which led him directly to Xiao Chen, who was hiding inside.
Even within the Divine Fire Sect, very few knew that the Eastern Wanderer had participated in the creation of nearly every Secret Manual for the Blood Refining Divine Technique.
The blood-red text was, in fact, written with real blood.
