Craft a dark and mystic fantasy masterpiece set in a realm shrouded in shadows and mystery. Envision a towering castle perched on the edge of a jagged, obsidian cliff, its spires reaching towards the stormy, moonlit sky. The castle's walls are adorned with ancient runes that glow with an eerie, otherworldly light, casting eerie shadows on the twisted, gnarled trees that surround the fortress. A lone figure, cloaked in tattered, hooded robes, stands at the castle gates, their face obscured by shadows, emanating an aura of both power and danger. Lightning crackles ominously in the distance, illuminating the dark, foreboding landscape with flashes of blinding light, while a chorus of howling wolves echoes through the night, adding to the sense of unease and trepidation. In the distance, a blood-red moon hangs low in the sky, casting a haunting, crimson glow over the desolate, haunted landscape.