Bab 700: Towards the Pure Enclave 

Three hours after Vicente's warning, the mana surrounding Onyx shifted, causing the area protected by the mana suppressors to darken, while darkness completely enveloped the black crow's body.

His aura, which had fluctuated over the past few days as if it had encountered a barrier that prevented its rise, suddenly transformed.

The great magical beast's physical and mental constraints reached a tipping point where they could absorb mana without drastic changes, emitting a thunderous sound that reverberated through the surrounding area and stimulated storms nearby.

As a fierce storm brewed, something abruptly drew all the mana in the vicinity into Onyx, as if his body had become a massive mana vortex.

Vicente's mount's aura finally ascended without limitation, breaking past the 4th stage barrier and rapidly doubling the mana within the creature's body.