Complex sentence: After the fight, Brainiac 5 angrily reminds them of the consequences of their actions and the Legionnaires return Clark to the present, with a Legion flight ring to which to communicate, though agreeing telepathically not to tell him about his future.
Split into simpler sentences: After the fight, Brainiac 5 angrily reminds them of the consequences of their actions and the Legionnaires return Clark to the present. They leave Clark with a Legion flight ring to which to communicate, though agreeing telepathically not to tell him about his future.