Vampiric Dragon Lord

Vampiric Dragon Lord (ヴァンピリック・ドラゴンロード) is a member of the Dragon Lord, the most powerful dragons in the New World.

Background
It is known that the Vampiric Dragon Lord is dead for now. Shown by it's epithet, the Vampiric Dragon Lord was an Undead Dragon, with Elder Coffin Dragon Lord.

The Lizard Man Heroes Arc
Zesshi Zetsumei guess that Shalltear may be the Vampiric Dragon Lord or Elder Coffin Dragon Lord, as she was too strong to be classified as normal vampires of this world.

Trivia

 * There is a possibility that Vampiric Dragon Lord is still active, as it is undead.