Leviathan

""I am a monster who looked down on everything. I had nothing to fear since birth. And I was a king of infinitely arrogant beings. I am a monster who considers everything trivial. All creatures in the Tower were under me, and the same held true for Ancient creatures and even those from the outside. Traumerei who brought me into existence, punished me for not recognizing him as my master and locked me in here, making me eat filthy emotions. But I fed on that hatred. And grew into a monster that never dies as long as the one I hate exists. Born wearing the armor of evil to go against the king and his people, I am Leviathan."'"

- Leviathan to Twenty-Fifth Baam

Leviathan (레비아탄, Lebiatan) is a giant serpent creature that was sealed inside The Frozen Waterfall within The Nest, a territory of the Lo Po Bia Family.

Appearance and Design
Leviathan looks like a dragon with a white, long, bull skull-like head, light blue eyes, deep blue scales, and a pale blue underbelly. It has terrifying mandibles with giant sharp teeth lining the inner edges, that can collide with each other. The teeth have two colors, blue and pink purple. The mouth shape looks similar to a shark, it having rows of sharp teeth. Leviathan also has 4 blue horns, with two striped giant horns beside its head resembling a bull's horns, and the other two smaller horns are located behind the giant horns. Leviathan also has a line of shinsu down it's back. (Similar looking to Bam's Water Dragon) At seemingly random sections of it's body, Leviathan has light blue balls of shinsu floating near it, with white shinsu wrapping around them and the beams they output. At the end of his long body he has a flaring shinsu tail.

The size and length of Leviathan's body is unknown, but when compared to Bam and Co., he easily dwarfs them, so he's quite large.

When partially beyond the area of it's seal, it had darker blue skin and white fur on it's mandibles and snout, which is most of the exposed area we see, hinting that when fully unsealed, it possibly has a mostly fur coated design at least on it's face.

Leviathan is a sentient creature. It can talk, feeling hatred, and has its own will and pride, much like the Ancient species or Administrator.

History
The creature mentioned that Traumerei is the one who brought it into existence, however it refused to recognize him as its master, in consequence Traumerei sealed it in the Nest and used it to store some of his memories. Specifically memories that Traumerei purposefully removed due to them bringing him much pain. For those reasons Leviathan despised Traumerei and all Lo Po Bia Family.

Defensive Battle
After Baam's party were guided by the mysterious voice, they arrived to a place with gigantic sealing circle. The voice asked if Baam can hear his voice since he came to the right place. The voice also asked if Baam can release or break the seal and set it free. After the seal was released, a gigantic serpent creature appeared and introduced himself as "Leviathan" and promised to lend Baam its power to fight against Lo Po Bia Family and Family Head Lo Po Bia Traumerei.

Unique Abilities

 * Possession: Leviathan possibly possesses an ability to take over another's body, as he said he would do so when Bam rejected his offer of partnership.
 * Transformation: As shown during its resistance to being devoured by Baam, the Leviathan also possess the ability to transform. Having shown to begin growing more hair in its mandibles and beginning to become more draconic in appearance as it began using more power to resist Baam.
 * Memory Eating: Leviathan may possess the ability to devour and "store" memories within it since Traumerei had force fed some into it, probably because they were painful to him.

Shinsu Manipulation
Leviathan can manifest a ball of energy from between it's mandibles, which can be blasted as a attack. Said attack is possibly what destroyed the Frozen Waterfall

We see Bam use the blue shinsu balls that hovered along Leviathan's body, they release as beams of blue shinsu, with a white colored shinsu wrapping around them.