abyssal gate opening in the center of an ancient ruin, dark energy swirling around the gate, shadowy figures emerging from the darkness, eerie light casting long shadows, air filled with the scent of ozone and decay, distant sounds of echoing whispers and faint screams, use of 'photorealistic', '8k', 'hyper-detailed', 'cosmic horror', 'dramatic lighting' to highlight the gate, 'depth of field' for immersive effect, 'HDR' for high dynamic range, 'color grading' for an otherworldly effect