"Only when you reach Level 9 can you break through the limits of the human body and successfully 'prolong' your life."
"Otherwise, when you reach the end of your lifespan, you will also die of old age like ordinary people."
"At most, you'll live for another ten years, but that's all."
"To break through to Level 9, you also need a huge number of crystal cores! This is no longer a problem that one or two Level 7 or Level 8 crystal cores can solve."
"It requires a lot of manpower and resources to help a Level 8 mutant advance to Level 9. Moreover, even with the resources, one might not be able to advance successfully."
"And these large factions, especially those like Sky Vault Corporation, who have many subordinates and control crystal core mines, are still very attractive to those people."
"Of course, if there are Level 9 crystal cores, these problems can be easily solved."