Dragon's Blood
Ailsa and Yaana both looked up at the ceiling, but neither could see exactly what Ryu was looking at. However, it didn't take Ryu long from stopping his laughter to walk to a shelf. In an inconspicuous corner, tucked away behind the numerous vials, Ryu easily picked out one and took it out.
"This… Dragon's Essence Blood?"
Ailsa was the first to understand. She came to a shocking realization that her own Bloodline was trembling. Clearly, whatever this blood was existed on a plane leagues beyond herself. However, didn't this make sense? The Heavens chose the Ancestral Beasts as their arbiters. By definition, they were the highest existence that there was in these lands.
"Whenever an expert of my Tatsuya Clan passes away, they leave behind their Essence Blood. That Essence Blood is then purified through the use of several techniques and precious treasures to be further concentrated.