With three beasts falling and vanishing back into the Abyss in quick succession, Agenon looked over and his face screwed up in discomfort. A pushback from the Cardinals he could still accept but this upstart's successful kills was putting a bad taste in his mouth.
With a visible strain of effort, the Wraith King increased the incentive of his commands on his Abyss beasts, causing them to break free of Evian's authority but even as they roared, there was very little more they could do.
Daria's thorny spell had had more than enough time to infiltrate their Eldritch bodies and reduce every physical capability they had by at least half. Since her spell, being of the Fifth Circle only, could not bring about the deaths of the beasts, this was the absolute next best thing.
Felling the Beasts after that was a matter of teamwork and there was only one detail that Evian made sure was clear to Armin since the Knight was not familiar with his ways,