When a person fails to advance a cultivation stage, they would naturally experience catastrophes that would decide their life and death.
If they could endure the catastrophes, that person would live and perhaps even have a chance to try to advance in the future.
This was what usually happened to those who faced a bottleneck for the first time and managed to come out of their failure in one piece, the normal thing to happen.
After something like this happened, these people would become much more cautious in cultivation, so some would spend centuries at the same level, preparing to have the best conditions pre-advance.
But if this person who had to deal with the catastrophes, which came in the same amount as the number of their cultivation stages, failed in at least one of them, everything was different.
Failure in a single catastrophe meant that that person could never advance a stage even if their vitality weren't injured.
