A Dungeon Break was a nightmare scenario, triggered when a dungeon wasn't cleared before its expiration period ran out. Once that timer hit zero, the entire structure would collapse, unleashing all the monsters that had been sealed inside.
These creatures didn't trickle out one by one, they poured into the world in massive waves, overwhelming and chaotic.
Even worse, the higher the dungeon level, the more powerful its inhabitants. The monsters it released would be vicious, resilient, and far harder to deal with than their lower-level counterparts.
What made it even more terrifying was their behavior. Monsters from the outside world generally stuck to their territories, attacking only when provoked or approached. But dungeon-born creatures were different. They actively hunted. They sought out life and tore it down without hesitation, making them a dire threat to any nearby city or settlement.