Here, some might ask:
Li Su had clearly already reached Foundation Establishment and possessed magical power, so why couldn't they see it?
Very simple—he wasn't using it!
Well, not exactly. Rather, he wasn't using it externally to form true astral force.
Foundation Establishment cultivators could take to the air not because they needed true astral force, but because once they reached Foundation Establishment, their inner qi was sufficient to support them in breaking free of heaven and earth's restraints.
Thus, as long as his magical power remained within and did not circulate, there was no need for it to spill out.
Of course, if that were all, it could still be seen through.
But Li Su was a body cultivator. His blood qi was terrifyingly powerful, and his entire body brimmed with an astonishing crimson radiance.
Under such circumstances, unless he actively used his magical power, it was impossible to see through his true condition with the naked eye alone.
As for the Vast Heaven Mirror, as a magic treasure, it was naturally incomparably wondrous.
But don't forget that Heavenly Moon Grotto was an independent world. Being able to peer inside it and project the events within in real time already displayed its capabilities to the fullest.
After all, the Vast Heaven Mirror was not meant for spying. It was an offensive magic treasure; locating people was merely one of its functions, and even that was meant for locking onto targets.
Thus, naturally, no one could tell that Li Su was not merely exceptionally strong in body cultivation—his spell cultivation was even stronger.
That was right. It was not just his body cultivation that was strong. At present, his spell cultivation was unquestionably stronger.
With Earthly Fiend True Astral Force alone, Li Su estimated that he could probably unleash somewhere