Seraph Empyrean

Seraph Empyrean is one of the highest, if not the highest ranked angel type monster.

Abilities
A Seraph Empyrean surpasses its cousin species: Dominion Authority, Principality Observation, and Archangel Flame in terms of magic abilities. Its potential is at least greater than 7th tier magic.

Trivia

 * A Seraph is a member of the First Sphere in the celestial hierarchy in Christianity. Regarded as one of the highest tiers of angels who are closest to the throne of God.
 * While none have been encountered so far, Seraph Empyrean is said by Ainz himself that he would have to fight it at full strength in order to defeat it.