A terrifying cursed fantasy greatsword floating in darkness, massive curved silver blade covered with dark blue engravings and glowing red-orange runes, intense electric-blue magical energy erupting from the blade, sparks and mist surrounding the weapon, brutal medieval design, black metal guard, worn leather handle, dramatic cinematic lighting, dark epic atmosphere, AAA video game weapon concept art, ultra-realistic 3D render, extremely detailed, high contrast, no text, no logos.