A photorealistic street art mural of a massive gray wolf prowling through the hollowed great hall of an abandoned medieval castle, its fur rendered in hyperrealistic spray paint with individual strand textures and icy blue eyes glowing in darkness, moonlight streaming through broken stained glass windows casting ethereal blue patterns across cracked stone floors, mood ancient and powerful yet lonely, composition dynamic with wolf mid-pause filling the grand space, scattered broken thrones and toppled medieval armor creating royal decay, color palette cool silver blues and deep charcoal contrasted with warm amber moonlight and soft violet glass reflections