Ye Mo felt he was used to using immortal crystals. He wasn't gaining much from using immortal crystals anymore, they weren't very effective for him. Truth realisation state level three was this hard to reach, reaching truth realisation state middle stage and above would be ten times harder, and truth realisation state tertiary stage would even worse.
If he didn't have immortal crystals, Ye Mo estimated that even if these 100 extreme grade spirit ranges could let him reach truth realisation state peak stage, it would take a hundred or even a few thousand years.
Ye Mo sighed, he just wanted immortal crystals to power the time formation disk.
But he knew this was something that an entire cultivation realm couldn't satisfy. Immortal crystals were something of the immortal realm. If they were everywhere in the cultivation realm, they wouldn't be called immortal crystals.