Character design of a void arcanist surrounded by swirling mist, rendered in photorealistic detail using Octane Render and Unreal Engine. The scene features hyper-detailed textures and volumetric lighting, enhanced with HDR effects. The arcanist is cloaked in shadows, with an aura of mystical energy, intricately layered robes, and ornate arcane symbols. The background depicts an ethereal, otherworldly landscape that mirrors the enigmatic nature of the void. The image is composed in a vertical aspect ratio of 9:16.