The breakthrough of realms, although time-consuming, had an exceedingly high success rate according to Milton Cheney's deductions.
The next moment, Milton Cheney no longer hesitated.
With a thought, he directly mobilized all the spiritual power within his spiritual body.
The full burst of spiritual power at the limit of the Six Spirits Realm caused a great disturbance, at least within his cultivation space at that moment, a loud boom echoed.
Fortunately, all of this was within Milton Cheney's expectations.
He was well aware that a breakthrough would inevitably cause a significant disturbance, but fortunately, this was his own cultivation space, and there would be no one else to suddenly appear and disrupt him.
He could confidently choose to break through to the Seventh Spirits Realm.
As time slowly passed, the black mist that swirled around Milton Cheney after the burst of spiritual power gradually began to be reabsorbed into his spiritual body.
