Capítulo 450: 7.16.4 I am here to kill you.

It's always "easy to come and easy go" in this world, it's one of the reasons why the people who obtain strength easily also die the fastest. That is the rule of the world which has never been proven false.

The same was the case for this woman in front of me. 

Mystics were beings who might have weak bodies or magical talents, but their spirituality will always be stronger than normal, it's a talent you can never inherit, but you have to be born with it. 

But not all mystics are born at the same level, there is always some difference between them and their limits, like the one in front of me.

In truth, going by her spiritual strength alone, the most she could have ever achieved was just a simple adept level throughout her life. Which would have been good and all, if not for one weakness that all Mystics suffer from.