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Raven bolstered through the following trials. The 4th, 5th, 6th...
Each one of these trials caused him to spend a gross amount of time in them that Raven completely stopped caring about it altogether. The kinds of trials he faced were somewhat absurd too. The 4th Trial was a hell-like place where he needed to continuously slaughter enemies without a single moment of rest. To complete it, he had to make sure he stayed alive with sanity remained intact after a five years.
The fifth trial made him learn how to a farmer. He was asked to cultivate spiritual fruits and ingredients until they reached the level of an Empyrean-ranked. It was incredibly time consuming, but one that Raven really enjoyed a lot.
The 6th forced him to solve 10,000 riddles with escalating difficulty. The 7th trial asked him to build and Burial Labyrinth. The 8th Trial made him create 1000 Monarch-ranked Battle Arts.