A hyper-realistic depiction of Thor, the God of Thunder, showcasing intricately detailed armor adorned with symbolic Norse motifs. Mjölnir is clasped firmly in his right hand, while arcs of electricity dance around him, illuminating his formidable presence. He stands steadfast at the gateway of Valhalla, the grand hall glowing with an ethereal light that enhances the dramatic scene. The backdrop features towering pillars and mythical carvings, setting the stage with a serene sky tinged with hints of the northern lights, adding a mystical touch to the composition.