"Illustrate a Golem Sentry in a vibrant color scheme of red, white, and blue, equipped with stone guns, against a mountainous landscape backdrop. The image should emphasize exceptional quality, lifelike details, sharp lines, stunning colors, and impeccable composition. The Golem Sentry's head should have a yellow visor for contrast. Achieve a captivating and well-timed moment with octane render, unreal engine 5, and a dynamic action pose. Trend on ArtstationHQ with this 4K, highly detailed, cinematic lighting, volumetric, and hyperrealistic illustration."