A vibrant green Ancient Gear Golem robot in a dynamic action pose, holding a gun and shield, yellow skull and crossbones emblem on chest, intricate mechanical details, against a dramatic Ancient Forest background with volumetric lighting. Cinematic keyframe, Octane render, Unreal Engine 5, HDR, depth of field. Highly detailed, sharp focus, trending on Artstation, CGSociety, Splash Ink Illustration style.