The Psi Nexus is a towering, futuristic structure with a sleek, metallic exterior that reflects the advanced technology of the Protoss. Its form is dominated by a central, glowing core that pulsates with psychic energy, surrounded by intricate, angular supports that give it a symmetrical, yet complex appearance. The surface is smooth with a glossy finish, featuring engraved Protoss hieroglyphs that glow faintly in the dark, adding to its mystical and otherworldly aura.