In the Foundation Establishment Period, Chen Yi's cultivation path focused on body refining. He reached two significant milestones - the Purifying Viscera at the fourth layer and the Marrow Refining at the fifth layer.
After refining his marrow to perfection, he could attempt to combine the refinement of all five aspects of his body in one step, in a process known as embracing the pill.
Upon successful completion of this step, he would enter the sixth layer of body cultivation, which would also be the Core Formation Realm for body cultivators.
For body cultivators, each step forward became increasingly costly as they moved deeper into their practice. At some point, even the resources of the entire world would not be enough to aid their advancement.
At this stage, Chen Yi required large amounts of second-tier medicinal materials, demon beast meat, and corresponding heavenly treasures.
