An ethereal armored knight standing ankle-deep in glowing water inside ancient ruined stone halls, tall and imposing posture. The knight wears ornate medieval plate armor with elegant curves and engraved details, crowned helm with antler-like extensions. From the armor flows bright turquoise spectral energy, forming liquid-like flames that swirl around the body and trail into the water. The weapon is a long staff or spear made of solid ghostly light, radiating cold magic. The environment is a submerged cathedral ruin with massive stone arches, mist, floating particles, and reflections in the water. Dominant blue-green spectral lighting, deep shadows, high detail dark fantasy artwork, mystical and haunting atmosphere. raz'sdarkfantasystyle-zit-mk.1