Meteoric Turtle

Meteoric Turtle was an NPC boss that existed in YGGDRASIL.

Background
Before Ainz Ooal Gown acquired the Great Tomb of Nazarick, they faced this boss and defeated it.

Appearance
Presumably judging by its name it resemble an enormous turtle.

Abilities
The Meteoric Turtle had a move where it enhanced its defense, then took to the sky before crashing down again like a meteor. Its signature attack was dealt a party-wiping amount of damage to everyone in the area. The countermeasures to this move were: unbalance the boss and forcibly break its defensive stance; take to the skies and halve the damage taken; or to continuously use defensive spells or skills to endure the onslaught.

Trivia

 * In the fight to conquer the Great Tomb of Nazarick, Bukubukuchagama noted that the final boss had similar abilities to Meteoric Turtle.