General Scoll ordering his troops to cast the barrier had led to the Alliance of Kingdoms taking out a significant lead over the Tribe of Death. And if he wanted, he could press the attack and make the most out of the lead he had just gained. It is what he would have done had it been an ordinary war between two human forces.
But he was currently up against the Tribe of Death. Even if it was just their mortal forces, it was still a transcendent faction with innumerable methods to win wars. Thankfully, he had already figured out the most likely method his opponent had chosen to secure victory, which meant he also knew how to use his own cards to beat the enemy.
And since General Scoll knew what he had to do to increase the chances of victory, he also knew that pressing the attack and charging toward the Tribe of Death now that they had fired their magic was one of the worst things he could do.