Floating silently in the vast emptiness of space, an enormous alien megastructure looms against the backdrop of a swirling nebula. Its surface is covered in intricate metallic veins and glowing energy conduits, pulsating with an unknown power. Towering spires extend infinitely, bending the fabric of space around them. A massive, rotating core at its center emits a steady, rhythmic pulse, sending gravitational distortions rippling through the surrounding asteroid field. Far-off planets orbit in the background, their surfaces reflecting the faint, ethereal glow of the cosmic monolith.