Catastrophe Dragon Lord

Catastrophe Dragon Lord (破滅の竜王) is a member of the Dragon Lord, the most powerful dragons in the New World.

Background
It seems that this Catastrophe Dragon Lord was already dead, as the "Thousand Miles Astrologer" of the Slane Theocracy predicted its revival.

The Undead King Arc
When it was predicted to be reviving, the Slane Theocracy had dispatched the Black Scripture, one of the six Scripture to deal with the situation.

Abilities and Powers
The Catastrophe Dragon Lord's power is unknown, but it should be noted that the Archbishops sent all thirteen members of the Black Scripture to defeat the Dragon Lord, which speaks volume of its power.