fantasy creature, Koschei the Deathless, intricate armor, glowing eyes, long tangled hair, sinister makeup, skeletal body, tattered cape, holding a magical staff, standing in a demilitarized zone (DMZ), barbed wire fences, abandoned tanks, overgrown grass, eerie atmosphere, desolate landscape, full-body shot, dramatic lighting, high contrast, foggy background, rusted metal textures, decaying structures, post-apocalyptic theme, cinematic angle, wide lens.