Right as Zhong Wen entered Level 5, Su Zimo ascended as well.
This level was the final test for one to become an Elementary Array Formation Master.
A combination array formation.
Even between Elementary Array Formation Masters, some had deeper understanding towards formations. Some could combine two, three or even more formations together.
Level 5's combination formation comprised of two of either an illusory, trap or killing formation.
The reason why it was difficult was partly because the combination of formation patterns was difficult to distinguish, making it easy to commit a wrong judgment.
At the same time, a combination of two Grade 1 formations implied that there were two formation eyes and that increased the difficulty level of the formation.
Even though Grade 2 formations had two formation eyes as well, they were still more difficult to dispel than two Grade 1 formations combined together.
The reason for that was simple.