Because ....

 They cut the video at the first test with the Mercury ball....

Second if saying Niagara Falls 鍛鍊 斷鏈 斷念 my traveling 

Thirds is with Anan like cannot wake up a dream to see what you are doing 

That ended 2014/ 2015 roughly. 

They have to make the entire cast shows with time. 

That’s it....

That belongs to the 長留初考

But then there are ...

練習賽

仙劍一

仙劍二

I never heard at any religions text or tales, they talk about exams. 

Testing faith for sure it grows out of my head, I don’t have that belief.