First Encounter is the 2nd chapter of The Last Son, Book One: Gatherings to be made by Nighlocktheawesome.
Clark Kent finishes his training the Fortress of Solitude for 4 years. Professor Xavier detects Clark's power signatures and recruits him as an X-Man.
Years later, 19 year old Clark Kent has been living in the Fortress of Solitude for 4 years, where he has been training in using his new-found powers powered by Earth's yellow sun, and as well as learning of his Kryptonian origins and civilization, and clad in a costume modeled after Krypton's defense military. He also catches interest in the "X-Gene" that grants people different powers along with other similar individuals that had been using their abilities for good.