A terrifying female sorcerer touched by the power of an ancient world serpent sleeping beneath the northern seas, standing on black coastal rocks during a violent storm. She has dark wet hair blowing across pale skin marked with glowing serpent-like rune patterns. Her emerald eyes glow unnaturally in the darkness. She wears layered black ceremonial robes, scaled armor fragments, and heavy silver jewelry shaped like intertwined serpents and ancient sea symbols. Massive spectral serpent shapes coil through storm clouds and ocean mist behind her while green magical energy ripples across the crashing waves. The atmosphere feels ancient, cosmic, and deeply ominous. Dark nordic fantasy illustration, cinematic storm lighting, eldritch sea atmosphere, realistic textures, mythological horror aesthetic, painterly realism