To reconstruct flesh and blood, one needs to consume large amounts of pure living creatures' flesh and blood, extract the vitality, forge a new body, then allow the original mysterious form to perish, leaving only a pure Divine Thought to inhabit the new body, akin to seizing a body.
Thus, a new life is attained!
However, Lady Yi encountered some unexpected events along the way, seemingly offending a super strong entity among the mysterious ones, so she was killed. The "Otherworld" of the tomb could not contain her, so she wandered and fell, only to be discovered by the Spiritual Parrot.
After all, Lady Yi was a significant figure among the mysterious creatures; the tomb contained mysterious Dao Marks, attracting various parties, leading to the many events that followed.
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