The illustrious magus stage realm. The first step of a cultivator's journey to attain immortality was achieved when one's spirit core had been developed thoroughly, ready to become the dwelling of the soul.
With the spirit core as the foundation and the nine pillars as the support, when one was ready to finally kick off the momentous undertaking, they would begin by sending their sea of consciousness – their soul, into their spirit core.
Despite the simple wording, such a task was far from easy. Hence, the reason why the [Scroll of Awakening] was created in the first place, to act as a guide for those aspiring magus and increase their chance of success.
If they managed to push through the perilous endeavor and succeed in accomplishing the arduous task, then they would finally obtain the strength they were striving for and become a bonafide magus. But if they failed, then the only ending for them would be death.