In an attempt to close the gap in their strength, Rex thought of everything he could do.
He already made observations of the white sphere before coming to this battle and deduced the level of damage it did through the suppression beam varies depending on the amount of energy an entity emitted beyond the threshold.
Even Rex himself had already felt the suppression beam.
Breaking through the eighth-rank realm barrier a bit would scorch his skin severely.
Meanwhile, barely breaking through the barrier only resulted in a sting.
From that experiment alone, he discerned that the level of suppression varied depending on the extent of the breach an entity committed against the First Breath. In contrast to his own experiment, the breach the Executor did through his spell was substantial.
At that moment, the Executor's aura surged to the nearing the peak of the eighth-rank realm.
Such a breach would evoke a devastating response.