Mr Devourer, Please Act Like a Final Boss Novel

The Dungeon Conquest era has emerged with the Seven Deadly Dungeons of Evil—seven formidable fortresses that exceed S-class dungeon difficulty. The Ancient Core reigns as the most notorious, concealing the most catastrophic boss monster in all of history. 'Isn't it your responsibility to stop them from reaching my sanctuary?' Yet I desire only peace and an eternity of complete inaction. This is the epic struggle of a boss monster yearning to do nothing at all.