When the apocalypse becomes your playground, and death is just the beginning of wisdom.Marcus Chen thought his biggest problem was explaining to his thesis advisor why his quantum archaeology research had stalled. Then the world ended. Then it ended again. And again.Trapped in a 72-hour time loop at the epicenter of rotating apocalypses, Marcus discovers he's become something impossible: a Temporal Nexus Core—a sentient dungeon heart that remembers every cy...