Atreus was surrounded by all of the 4 disciples of Romulus that have been training under him for decades at this point. The purpose of this bout was very simple but significant.
To set the Hierarchy.
Kahn had his Survival Instinct blessing on high alert as well as Hunter's Domain activated from the get-go. Now, 40 kilometers of this pocket dimension was no different than a hand-drawn map for him where he could detect, feel and predict even the most minute details.
BOOM!
This time, a dreary and terrifying dark blue aura erupted from his body as he activated War Dominance aura infused with his Water and Ice element, sending shivers in the bodies of his opponents.
With this blessing raising the quality of his oppressive aura by 5 times, everyone else was instantly on alert mode because now, Atreus' aura resembled that of a peak 4th stage saint who was about to break through to 5th stage saint rank very soon.