Under the current special illusion, Chen Fei killed every Primal Fiend with a single move, so killing Primal Fiends did not actually take much time.
What truly took time was finding the illusion where a Primal Fiend was located, then entering it.
After all, this secret realm was not under Chen Fei's control. Chen Fei had merely seen the Heavenly Dao's operation, found a suitable point of entry, and then entered the secret realms of other Primal Fiends.
And although the Primal Fiends inside the secret realm were all currently within illusions, the areas where they had fallen into those illusions were not the same.
Chen Fei leaped between the various illusions. If he had not borrowed the power of the secret realm's Space Heavenly Dao, how could he possibly have shuttled through them so quickly in such a short time?
But since it was borrowed, he naturally could not do as he pleased. And to avoid the Secret Realm Heavenly Dao's backlash, Chen Fei did not dare go too far.
So taking several breaths to kill one Primal Fiend was inevitable. Moreover, Chen Fei did not specifically pick Eleventh-Order Late Stage Primal Fiends to slaughter, but chose those closest to him instead.
Because if the distance was short, the time spent would be reduced by a great deal. If Chen Fei deliberately searched for Eleventh-Order Late Stage Primal Fiends, he would first have to locate them, then search across a great distance for a crack in the illusion, and only then could he borrow the Space Heavenly Dao.
What consumed the most time was actually long-distance spatial leaping. This was not Teleportation; it was merely far faster than Chen Fei's normal flight.
If it took a short time, several breaths were guaranteed. If it took longer, twenty or thirty