Going Through the First Test
Before Krune and Feifei decided to give it a try, they tried to gather more information. As it seems, one can only go through the test alone. That means that Feifei and Krune can't help Fie. Also, once you pass, you can't come back. So if your companions can't go through, you will be alone up there.
Also, Krune and Feifei found that you don't need to defeat all those ten enemies, you just need to hold for 10 minutes. As long as you stay for this long, you will be sent to the other side.
However, it seemed like this Light Pillar was also an excellent opportunity for training. The enemies inside were created through a fantastic formation, and they were a perfect match for each cultivator and demon beast. If you lose, you still gain quite some experience. They seemed to target every cultivator and demon beast's shortcomings.
"So, Fie has to be the second one to try. Also, it is only in case the first one passes it. Who should try it first?"