In a galaxy far beyond the reach of ordinary starlight, where the fabric of space-time shimmered with ethereal energies, there existed a realm known as the Celestial Expanse. This was a place where the rules of reality bent and twisted, and where the impossible became possible. It was here that He-Man, the most powerful man in the universe, found himself on a mission unlike any other.

He-Man had been summoned by the ancient cosmic guardians, the Celestials, to address a dire threat. A rogue cluster of meteorites, infused with etheric rays, was hurtling through the Celestial Expanse, on a collision course with the planet Eternia. These meteorites were not ordinary; they were imbued with a strange, otherworldly energy that could warp reality itself, causing untold destruction if they reached their destination.

Mounting his trusted Battle Cat, Cringer, He-Man rode to the edge of the known universe, where the boundary between reality and the Celestial Expanse blurred. With a mighty leap, he left Cringer behind and soared into the void, guided by the shimmering trails of etheric energy that flowed like rivers through the stars.

As he approached the rogue meteorites, He-Man marveled at their beauty. They glowed with an inner light, each one a miniature sun, casting prismatic beams of energy that danced across the void. He knew he had to act quickly; the meteorites were accelerating, drawn by the gravitational pull of Eternia.

Channeling the power of Grayskull, He-Man reached out with his Sword of Power. The blade resonated with the etheric rays, creating a bridge of energy between him and the meteorites. With a mighty heave, he swung himself onto the largest of the celestial rocks, landing with a thud that echoed through the ether.

Riding the meteorite like a cosmic surfer, He-Man steered it away from its deadly course. He used his strength and skill to redirect the entire cluster, weaving them through the etheric currents with precision and grace. Each meteorite responded to his touch, guided by the harmonious energy of the Sword of Power.

As He-Man rode the meteorites, he encountered strange and wondrous phenomena. He passed through nebulae that sang with the voices of ancient stars, and navigated around black holes that whispered secrets of the universe. He even glimpsed the spirits of long-forgotten heroes, who watched over the Celestial Expanse with eyes of pure light.

Finally, after what felt like an eternity, He-Man succeeded in guiding the meteorites to a safe orbit around a distant, uninhabited planet. There, the etheric rays could be harnessed for good, providing a source of boundless energy for future generations.

With his mission complete, He-Man returned to Eternia, where he was hailed as a hero once more. The people of Eternia marveled at his tale of cosmic adventure, and the Celestials bestowed upon him a new title: Guardian of the Celestial Expanse.

And so, He-Man continued his adventures, ever vigilant, ever ready to protect the universe from threats both known and unknown. For in the boundless expanse of space, where etheric rays danced and meteorites soared, there would always be new challenges to face and new wonders to discover.