(Chaos V) Ultrastorm Leviathan

Lore
The Leviathan started to give resentful roars towards the Heavens. It was growing weary of waiting for its promised opponent and the burden it was forced to bear in the meantime. This was to be expected, as it only possessed the capacity for hatred and fury.

Acquisition
Evolve (Chaos I) Ultrastorm Leviathan with Leviathan Catalyst four times.

Name origin
Leviathan is a creature with the form of a sea monster from Jewish belief, referenced several times in the Hebrew Bible.