Create a detailed 3D medieval fantasy knight in full plate armor with silver and gold accents. The armor should have intricate engravings and show signs of wear from battle. The knight wields a rune-inscribed sword and a shield with a lion crest. Their stance is heroic, with a tattered cape flowing behind them. The helmet partially reveals a stern, battle-worn face. Set them in a fantasy landscape with a castle and stormy skies, emphasizing a strong, dynamic pose as they prepare for battle.