Forerunner concept sheet, center a tall metallic-skinned humanoid on a floating geometric throne, left a Knight-class Promethean melding machine and biology with a light blade, right cold-white relic fortress with self-repairing geometry, background arc of the Ark shield world, unified cold-white and pale-gold divine palette, flat design-sheet style, iconographic composition, highly detailed, no text
Inside a Forerunner relic fortress, cold-white metal corridors with slowly rotating floating geometry, pale-gold light falling through a domed rift, a Knight guardian standing statue-still, a distant Index sanctum glowing faint blue, a million years of silence condensed into divine pressure, cinematic concept design, grand empty composition, photorealistic lighting, cold-white-gold palette, highly detailed, no text