The law of the martial world was known to all. It was a cruel place, but often times those who were willing to sacrifice more, were rewarded with more.
In this case, the death of Elder Daiyu catalyzed the bewilderment formation used around the Belmont Holy Land to all new heights.
Elder Daiyu knew from the beginning that if he somehow died, his clan would be doomed. Because of this, he set contingencies. The first thing he did was hand much of his belongings to his grandson, Chenglei. This was why Meiying was able to 'steal' the box in the first place.
However, the second thing he did was probably the most important. Elder Daiyu invested heavily into preserving this formation for this specific plan. It was a formation that was tied to the life and death of its layer, and was able to use Elder Daiyu's death as a catalyst to become stronger.
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