"I take what belongs to me. I take what belongs to others. I take what is satisfying to me. I will take what satisfies others. I will take it all. And mine it will be."
Leviathan is a sea monster, and a demon of darkness and chaos referred to in the Tanakh and the Bible. In demonology, Leviathan is one of the Seven Princes of Hell and its gatekeeper. Leviathan as the gatekeeper is known as the Hellmouth where the mighty demon's mouth is the gates of Hell itself.
He is also the representation of the sin, Envy. The word "leviathan" has become synonymous with any large sea monster or creature. In Modern Hebrew, the name means simply "whale." According to Judaic lore, the Behemoth and Leviathan will do battle at the world's end, and kill each other, leaving their bodies to be feasted upon by the chosen peoples who survive.
In the Book of Job, Leviathan is described to have the ability to shoot fire. Example being, "Out of his mouth comes burning lights. Sparks of fire shoot out." It's size was immense to the point where the very sea boils when it swims on the surface. It ruthlessly and fearlessly rules over all creatures of the sea.
Leviathan's skin is like a double coat of mail, with overlapping scales as large as shields on its back, and as sharp and hard as broken pottery on its underparts. Swords, harpoons, and even bullets will simply bounce off such protection. Its fins are known to radiate a brilliant light with its eyes like the glimmerings of the dawn.