Divine Beast Leviathan

The Divine Beast Leviathan (リヴァイアサン) is a character from the spin-off "Arifureta Shokugyō de Sekai Saikyō Zero" series.

It is a gigantic Monster that was sealed away the floating island Andika.

Appearance
The Leviathan was a gigantic serpentine-like creature at least 1 km long, with its head alone being 300 m. It was covered in black metallic scales, with each of them the size of a tower shield, and its mouth was filled with two layers of razor-sharp fangs.

Personality
As a Monster, the Leviathan was incapable of possessing complex emotions and was only able of acting on its instincts that were considered too dangerous for it to roam about freely. It did, however, display and unyielding hatred towards Andika due to it having been the source of its imprisonment for thousands of years.

History
The Leviathan was a Monster that existed long ago during the age of gods on Tortus. Its power was so dangerous that the people prayed to the gods to protect them from it, to which they responded by sealing it away with a giant Artifact in the form of an island that would be known as "Andika". The Leviathan's seal remained undisturbed for many centuries, until it was discovered by Andika's ruler Baharl Devault. He found some ruins deep below the island that included a shattered fresco depicting the history of the Leviathan, as well also being the key to releasing it once it was repaired. Baharl had his daughter Diene use her special magic "Renewal" to repair some of the fresco in the hopes of it telling him a way to control it for himself to use against his enemies. As Diene spent more time restoring the fresco, Andika's weather and surrounding sea life became increasingly violent until Baharl eventually decided that it was too dangerous and suspended his efforts at researching it.

When Andika suffered an attack from both the Melusine Pirates and the Holy Church, the Leviathan was freed from its seal after Diene used her magic to restore the fresco while under the mental control of the Apostle Ahat (who was acting on her master's orders). Once it was freed it immediately unleashed its power and attempted to destroy Andika in anger for having been sealed under it for so long. Its efforts, however, were being thwarted by Miledi Reisen as she was using her Gravity Magic to keep Andika suspended above the water in order to protect the people living there. Her interference further angered he Leviathan and it unleashed a powerful magical jets of water from its mouth that killed many of the church's knights and nearly killed Miledi's companion Oscar Orcus while he was protecting her. It continued its attacks and had nearly pushed them to the brink of defeat, but was saved by Meiru Melusine as she used her Restoration Magic to aid them. Oscar then engaged the templar knights while Miledi and Meiru fought the Leviathan. Despite the two's best efforts, they were unable to inflict much damage against the gigantic Monster, and whatever damage they did manage to inflict was healed almost instantly afterwords. As they two of them were running low on mana, Miledi came up with a plan after realizing that the Leviathan's scales were made of metal. As the Leviathan unleashed another ferocious elemental attack against Miledi, she managed to endure it long enough for Meiru to sneak up on its head an used her magic to reopen its previous wounds. Immediately afterwards, Oscar arrived after being teleported by his comrade Naiz and used his "Metamorph Chains" Artifact to transmute the Leviathan's metal scales off of its head. That provided an opening for Miledi to unleah a powerful lighting attack with all the mana she had left, and killed the beast in an incredible display of power.

Despite the Leviathan's death, its initial efforts to sink Andika succeeded, but the citizens managed to evacuate to safety.

Physical Abilities

 * Immense Physical Strength - The Leviathan has great strength in proportion with its size.
 * Immense Durability - The Leviathan's metallic scales are able to protect it from most attacks.

Magical Abilities

 * Immense Mana - The Leviathan possesses an overwhelming amount of mana that it's able to produce massive shockwaves from its emission.
 * Weather Manipulation - The Leviathan is capable of generating massive storms through its very presence alone.

Skills

 * Mana Manipulation - It allows direct manipulation of mana without the need for magic circles or incantations.
 * Mana Discharge - Allows the user to focus and emit mana from their body.
 * Mana Conversion - Allows the user to convert mana into stat bonus for a certain period of time, thus allowing them to boost their own strength.
 * Healing Conversion - Converts mana to boost natural self-healing rate.

Trivia

 * In, the  was a primordial creature that was referenced several times in the Tanach as having been slain by God. In one iteration, it was actually regarded as a representation of God's powers.
 * The Leviathan is currently the largest known Monster to have existed.