After the completion of the first round of minor tests, the practical tests had just begun.
The abilities required for a Secret Keeper are numerous and varied, so the method of testing is slightly special.
On one hand, it is broad, meaning that most of your basic abilities need to be up to standard.
For example, combat power, resistance to pollutants, basic intelligence analysis, and so on. If these fall below the basic pass line, you would essentially be rejected... allowing you to proceed would be irresponsible to others and to your own life.
On the other hand, it focuses on specialization, taking into account your key abilities and integration of various skills.
Therefore, the practical tests for "breadth" generally have low thresholds but high limits.
As for the "specialization" tests, if you do not have a particular talent in that area, it's better not to waste time.
"...So, who exactly killed him?"