Five years passed like river water—steady, unstoppable.
Kai grew into a quiet, watchful boy with messy black hair and those same storm-gray eyes that seemed to drink in every detail. He never cried when he fell. He never complained when winter winds howled through the cracks in the mill walls. He simply watched Zen move through the simplest of chores with a grace that belonged on a battlefield, not beside a washtub.
Zen taught him in secret.
At dawn, while the town still slept, they stood on the flat rocks behind the mill. Zen's empty sleeve was tied neatly; his right hand held a slender wooden practice rod.
"Again," he said.
Kai, barely tall enough to reach the old man's waist, copied the slow, flowing stance. His small hands traced circles in the air. Most children his age were still learning their letters. Kai was already learning the First Form of the Void Step—a martial art so rare that even the greatest academies of Valoria had only fragments of it.
He stumbled.
Zen caught him before he hit the ground.
"The strong survive. The weak are swallowed. That is the law of Heaven Falls, young master. Not because the world is cruel, but because the portals never sleep. If the guardians falter, the spirit beasts will pour through and turn every city into a graveyard."
Kai looked up, serious beyond his years.
"Then I won't be weak."
Zen's smile was small and painful.
"Good. Because your blood will not let you be ordinary."
That night, while Kai slept, Zen sat by the river and allowed himself one moment of memory. He recalled the upper realm's towering spires, the way Kai's mother had kissed her son's forehead and whispered, "Hide the shadow. Let no one know until he can carry it."
The boy's affinity had not yet awakened. But Zen could feel it coiled inside him like a living darkness—patient, vast, and utterly unique. Shadow was not one of the six common elements taught in the schools. It was something older.
Something the five continents had never seen.