Design a futuristic architectural structure that radiates dread and mystery, blending smooth, organic forms with an ominous presence. The structure should rise from a dark, fog-laden landscape, its surface a mix of blackened metal, obsidian-like textures, and faintly pulsating veins of crimson or eerie phosphorescent blue. Its towering, undulating forms should feel alive, almost sentient, with shadowy voids, hidden entrances, and corridors that seem to lead nowhere. Soft but haunting lights spill out from within, casting distorted, moving shadows that make the structure feel like it's watching. Surround it with an atmosphere of dense mist, faint whispers of wind, and a sky tinged with unnatural, foreboding colors