Mastodon Leviathan, majestic sea monster, ancient mythical creature, massive body, scaly skin, sharp teeth, glowing blue eyes, ocean waves crashing against rocks, stormy weather, dark clouds, lightning bolts illuminating the sky, rugged coastline, misty atmosphere, eerie green glow, bioluminescent markings, powerful tail, splashing water, dramatic lighting, cinematic composition, 3/4 view, low-angle shot, epic fantasy art.