A hyper-realistic character design of a void arcanist enveloped in swirling mist, showcasing intricate details in their clothing and features, rendered in photorealistic quality using Octane Render and Unreal Engine. The scene is illuminated with dramatic volumetric lighting and high dynamic range to accentuate the ethereal ambiance, capturing the mysterious and arcane essence of the character. Subtle glowing runes can be seen on their robes, hinting at their mastery of otherworldly powers, as the mist around them pulses with an otherworldly glow.