Circular stone altar, cracked ritual symbols, glowing sigils pulsing, eerie stone pillars leaning unnaturally, bioluminescent fungi growing around base, flickering eldritch lanterns, rusted ceremonial daggers scattered, bloodstained stone, arcane carvings shifting when observed, dense fog swirling unnaturally, skeletal remains half-buried, unsettling runes on weathered stone, shattered obelisk radiating cosmic energy, deep crevices oozing black ichor, unsettling mechanical contraption nearby.