Ultraman Rex, apprentice to the Giant of Light, Ultraman Zero, appears after the Absolutian Kingdom storyline. Because the Future King is incredibly powerful, Rex is given a mission to transmigrate into the past, increase his strength, and change the future. In the past, he gains new powers and learns the Leo Kick, martial arts, and his signature beam attack. He then travels further into the past to help Zero defeat his old enemies while doing everything he can to prevent the King's birth. The final enemies are Tartarus and the King of the Absolutians. Let's become Saga together and fight for the future! Ultimate Zetton, Belial Atrocious, Juda, and Tartarus, come fight me!
