The Gateway of the Realms

In an era not defined by time, in a land untouched by the structures of human civilization, existed an ancient and magical world named Seinia. The inhabitants of this celestial land were immortal beings of light known as Lumineers. Their essential purpose was to guard the Gateway of the Realms, which connected millions of dimensions together.
In Seinia's heart, atop Mount Einhorn, stood the magnanimous wind-made castle, where the Lumineers lived peacefully, feasting upon the brilliance of the stars and the memories they held. They were led by an eternal being known as Iolanthe, the Luminary Prince, who was bestowed with extraordinary wisdom.
One day, a dark cloaked figure appeared at the grand entrance of the castle. It was Hades, the notorious sorcerer from a hostile realm. He coveted to usurp the Gateway of the Realms to take control of Seinia and all existing dimensions. Seeing the Lumineers as a threat, he sought to obliterate their existence and wield their powers.
Despite his formidable power, the Lumineers stood against Hades, protecting their ancestral home. They conjured a barrier of light that withstood Hades' shadowy onslaught. But the sorcerer was relentless, and a brutal war ensued.
In the midst of the chaotic battlefield, Iolanthe, envisioning their possible defeat, devised an audacious plan. He decided to split his soul into a myriad of fragments, implanting each inside a human child from different dimensions. The children, oblivious to their powers, would stand a chance against Hades when the time was ripe.
With a heavy heart, and an incantation of ancient Lumineer essence, Iolanthe executed his plan. The Lumineer Prince's body dissolved into ethereal fragments, each traveling across dimensions, seeking out a destined human carrier.
In the present day on Earth, these children grew under different cultures, discovering superhuman abilities and unusual phenomena occurring around them. Despite their differences, they felt an inexplicable connection amongst themselves and with something beyond their comprehension.
One of these carriers, a young woman named Lily, was having recurring dreams of a mystical world filled with radiant entities, grand castles, and fierce battles with a shadowy figure that left her waking up in cold sweats. Deep within, she yearned to unravel the origin and significance of these dreams.
An old amulet she found as a child started shinning mysteriously; it was a sign that Iolanthe had foreseen. Lily, through the amulet, was connected to all other carriers, and they set off on a quest to discover their concealed identities.
Throughout their journey, they were trained by remnants of Lumineers, who guided them in understanding their powers and the desperate destiny they were destined to fulfill. United by their cause, the carriers became a family, supportive of one another throughout their hardships.
As they honed their strength, Hades became aware of Iolanthe's plan and decided to stop them before they could challenge him. He unleashed monstrous creatures to hunt down the carriers, instilling fear and confusion in their lives.
The carriers, albeit shaky, stood resolute against Hades' forces, confident in their abilities and the cause they were fighting for. Each battle brought them closer to the final confrontation with Hades, their powers only growing stronger.
In the climactic finale, the carriers, now practically Lumineers themselves, confronted Hades. A battle of cosmic magnitude erupted, and the forces of light clashed against the darkness. The carriers, anchoring on their shared strength and Iolanthe's spirit within them, finally subdued Hades, his shadowy form vanishing into oblivion.
With Hades' defeat, the gateway was restored, and peace reinstated. The carriers, now guardians of the Gateway of Realms, carried on with their mortal lives, promising to protect their realms and meet once the dimensions were threatened again.
The ancient Lumineer prophecy was thus fulfilled, and Iolanthe's sacrifice was not in vain. As the brave, young Lumineers stood guarding the portal from atop the Castle Einhorn, the spirit of Iolanthe's wisdom walls whispered, 'The stars have witnessed, the pride of light has sustained, and the guardians have emerged victorious.'