Superboy & the Legion of Super-Heroes #231

In "A Day in the Death of a World!", the Legion of Super-Heroes races against time to evacuate the doomed planet Mordan as its star hurtles toward a catastrophic nova. With Karate Kid and Princess Projectra taken hostage by the Fatal Five, the Legion must navigate both the ticking clock of planetary destruction and the ruthless demands of their enemies, who seek to turn the planet’s final moments into a source of unimaginable power.

In "Chapter 2: 3 Hours to... Holocaust!", the Legion of Super-Heroes races against time to stop the Fatal Five from triggering a star’s nova on Mordan. With Superboy, Saturn Girl, and the rest of the team working under pressure, they infiltrate Tharok’s ship, using cunning to uncover the device’s control—only to face a final, desperate choice when Tharok sets the ship to self-destruct. The escape is tight, but the threat of the Fatal Five’s return lingers.