The Rainbow Sword: A Colorless Swordsman and the Seven Mythic Kings

Theo Bright has one dream: to become a great swordsman. But on the day every young warrior receives a magical color, his blade shows nothing. No fire. No water. No wind. No lightning. Just a clear sword, an empty reflection, and a village full of whispers. In a world where seven colors decide a person's path, being colorless means being left behind. Theo's transparent sword, Arcraid, should have marked him as a failure.
Then a wounded red dragon falls from a burning crack in the sky, and Theo does the one thing no one else dares to do. He runs into the flames. That reckless choice draws him into a journey far beyond his quiet village. Across fire valleys, sinking harbors, storm roads, moonlit forests, floating mountains, and skies torn open by wild magic, Theo must face the Seven Mythic Kings-ancient rulers of dragonfire, deep water, white wind, golden thunder, silver moonlight, green life, and black stone.
But Arcraid is not a normal sword. It cannot hold one color. It may be able to carry them all. With a stubborn young dragon at his side and dangerous trials ahead, Theo must prove that being colorless does not mean being powerless. Yet every new color brings a harder test, and the sky itself is beginning to break. For fans of epic fantasy adventure, dragon bonds, magic swords, elemental trials, coming-of-age heroes, and fast-paced light novel fantasy, this is a complete fantasy adventure about courage, friendship, and the blade no one understood.
If a colorless boy can carry the power of seven kings, what will it cost him to draw the rainbow sword?