A Tier-5 Ordeal was different from the rest.
Rather than 'test' a single group of people at a time for the Ordeal, it would target the entirety of the race. It would no longer be a short, contained battle but a long arduous war between two 'sentient' species.
To put it simply, if the Ordeals from Tier-1 to 5 were similar to short, single subject pop-quizzes, then the Tier-5 Ordeal was similar to the final exams with all subjects being tested on the same day!
Humans being the only dominant species within their system for a long time, led to the entire race having a sense of arrogance and superiority.
This arrogance resulted in them grossly underestimating the difficulty of the upcoming Ascension.
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And so it began. Mankind's Ascension on an elevated difficulty level began with a…
…horrendous defeat!