Seen in “The War of Paradigm City”.
Behemoth, named after the creature mentioned in the Book of Job, appears at the end of "The War of Paradigm City". It is many times larger than the other megadeuses, and bears large drills on its shoulders and a quadruped design. The Behemoth is activated by Vera Ronstadt, the leader of the Union, and is only seen for a brief time. As Big O lifts it into the air it is crushed under the weight of debris falling from above the city. It is the counterpart to Leviathan (Megadeus).