Create a breathtaking image of the Einherjar, the legendary male warriors of Norse mythology, standing in the grand hall of Valhalla. Each warrior is clad in resplendent, intricately engraved armor adorned with runes and Nordic symbols, their imposing helmets featuring horns or wing-like designs. They wield mighty weapons such as glowing swords, axes, and spears, and carry ornate shields. The Einherjar are depicted with tall, muscular physiques and determined expressions, showcasing their readiness for Ragnarok. Accompanying them are ethereal Valkyries in flowing garments, adding a divine presence. The background features the majestic pillars and golden tapestries of Valhalla, illuminated by an ethereal light. The scene is filled with dynamic particles of energy, embers from roaring fires, and swirling magic, capturing the epic and otherworldly atmosphere of their eternal preparation for the ultimate battle.