Star Wars: Visions - T0-B1

Shortly after the Great Jedi Purge, a droid named T0-B1 (Tobi) lives on a deserted planet with his armless creator Professor Mitaka, and dreams of becoming a Jedi Knight. One day, Mitaka tells him that in order to become a Jedi, he must find a kyber crystal so he can forge a lightsaber. T0-B1 scours the planet, but finds nothing. He defies Mitaka's orders to never enter his basement, discovers a starship, and accidentally sends a signal that alerts a Sith Inquisitor to their presence. Mitaka reveals himself to be a former Jedi and hides both T0-B1 and his old lightsaber hilt. When T0-B1 leaves his hiding spot, he discovers that the Inquisitor has ransacked Mitaka's lab and killed him. T0-B1 continues his research and successfully terraforms the planet, but is confronted by the Inquisitor. Upon fixing Mitaka's lightsaber, T0-B1 is revealed to be powered by a kyber crystal and designed by Mitaka to be able to wield the Force, and igniting the lightsaber, kills the Inquisitor in a duel. He then departs the planet to explore the galaxy and uphold Mitaka's legacy.