12 parts Ongoing Here's a more interesting take on your story concept:
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A boy from a mundane, technology-driven world stumbles upon an ancient artifact-a glowing riftstone-that pulls him into a vibrant magical realm teeming with wonders and dangers. In this new world, he discovers he is a Riftwalker, someone capable of traveling between dimensions. However, his arrival disrupts the delicate balance of power, awakening ancient forces and drawing the attention of both allies and enemies.
As he navigates this strange land, he learns that his destiny is intertwined with the fate of the magical world. To survive, he must master the art of Riftwalking, uncover the secrets of the artifact, and choose between returning to his own world or embracing his new identity as a savior-or destroyer-of this realm.
With mythical creatures, hidden kingdoms, and a looming war, his journey becomes a race against time to uncover the truth about himself and the riftstone before the magical world collapses into chaos.