Create a towering, monstrous entity with an octopus-like head, writhing tentacles, a grotesque humanoid body, rubbery textured skin, and tattered, bat-like wings. Its clawed hands and feet exude power as it emerges from a stormy sea, surrounded by crashing waves. The sky is dark and ominous, with flashes of lightning illuminating its alien grandeur. Faint green light emanates from its form, evoking dread and awe, while ancient ruins in the distance hint at a lost, cyclopean civilization.