Years before the Great War, Nate Morgan was the head of a team of underground scientists in the city of Megapolis which were studying to create a clean alternative for the fossil fuels that had been polluting the Overlander cities for years. One of the science team members, Julian Kintobor, sabotaged the calibrations of one of the early prototypes and encouraged the unsuspecting Nate to go ahead with the test. Due to Julian's tampering, the test resulted in a massive explosion, which would later cause Nate to be banished from Overlander territory forever. (StH: #65)