Illustrate the Hindu deity Shiva seated in deep meditation atop a towering mountain, exuding a majestic and divine presence. His form should be luminous, with a radiant glow that signifies his immense power and divinity. Surround him with dynamic, swirling clouds and the majestic backdrop of snow-covered peaks, capturing a serene yet formidable atmosphere. Include the iconic serpent coiled around his neck, symbolizing his mastery over cosmic forces. This depiction should evoke a profound reverence and awe, with Shiva portrayed as the supreme deity reigning over the sacred mountainous realm, embodying tranquility, strength, and divine authority.