The power of a Thirteenth-Order Spatial Characteristic could not be called invincible within this Twelfth-Order Secret Realm; after all, Chen Fei's own cultivation realm was limited.
But when facing many problems, it truly gave Chen Fei many different choices.
If brute force were used against this Ancient Cave Abode, the entire Rongxu Realm would be able to sense it. Even if one were proficient in formations, silently and invisibly unraveling the formation outside the cave abode would require an extremely long time.
And no one knew whether, at the instant the formation was undone, some commotion might still spread out. If that truly happened, then everything done beforehand would all be wasted effort.
Now, however, relying on his own attainments in formations and with his body transformed into nothingness, Chen Fei directly crossed over the Ancient Cave Abode's formation.
If someone were still presiding over this cave abode's formation, then faced with Chen Fei's method of crossing the formation like this, they could decisively change the formation's Nodes and thereby block Chen Fei outside.
But this formation, which had existed for who knew how long, had no one presiding over it. It could only operate according to its own inherent rules. Under these circumstances, when faced with Chen Fei's way of passing through the formation, it had no measures to respond at all.
When Chen Fei entered the Ancient Cave Abode, all the Twelfth-Order Primal Fiends throughout the Rongxu Realm wore grave expressions at this moment, even those Twelfth-Order Mid Stage Primal Fiends were no exception.
Eight Twelfth-Order Initial Stage Primal Fiends, plus Xiao Jiwen, a Twelfth-Order Mid Stage Primal Fiend, had all died and suffered Dao Dissipation in a short span of time.
The other Twelfth-Order Initial Stage Primal Fiends still did not know what had happened, but those