The dragon bloodline can transmit vitally important information to all giant dragons or dragon descendants through bloodline resonance. The extinction of the Brass Dragon, in the dragon clan, carries grave importance. It is almost equivalent to sounding the prelude to the mass extinction of the dragon clan.
The Giant Dragon Clan consists of three ancient dragon species: the Brass Dragon, the Green Copper Dragon, the Red Copper Dragon, and three upper-level Giant Dragons, Gold Dragon, Silver Dragon, and Black Dragon. Lower-level giant dragons include the Red Dragon, Green Dragon, and Blue Dragon.
In addition, there are a large number of sub-dragons and dragon descendants. Given the nature of the Giant Dragons, there is no way to keep count of how many sub-dragons and dragon descendants have existed in history or are now emerging.