Even for those sects who obtained the Seven Apertures Spirit Secret, the cultivators with natural talent at most could only master the first four Heart Eyes. As for successfully constructing the latter three Heart Eyes, it was almost an impossible feat.
If Zhou Sui hadn't received the assistance of the Book Worm, he likely wouldn't have been able to accomplish this either.
After all, during the process of constructing a Heart Eye, failure is absolutely not an option. Even a single failure would cause severe damage to the mind, making a second attempt virtually impossible.
"The Seventh Heart Eye Insight, its mana patterns consist of at least 102.4 billion pathways."
"Its complexity surpasses that of the Sixth Heart Eye by several hundred times over."
"To successfully construct it, the difficulty is unimaginable. It is utterly not something that can be done overnight."
"Though this is quite a normal matter."
