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Elder Coffin Dragon Lord (朽棺の竜王) is a member of the Dragon Lords, the most powerful dragons in the New World.

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

Trivia

 * Zesshi Zetsumei guessed Shalltear may be the Vampiric Dragon Lord or Elder Coffin Dragon Lord, as she was too strong to be classified as normal vampires of the New World.
 * There is a possibility that Elder Coffin Dragon Lord is still active, as it is undead.