Saleen did not fire more than one lightning icicle. The Goddess of Myers was not someone that he would have been able to take on after all. The lightning icicle, controlled by Saleen, fired turned around and stuck inside the wall on the other side.
He saw that there were also lightning magic patterns on the spell reflected by the water mirror.
That lightning magic patterns were incomplete, or rather, the goddess was unable to grasp the true nature within, but they were nonetheless enough to reflect his attacks. The mirror was at least able to stay intact when hit by his lightning attack and complete the counterattack.
"Too weak." The goddess shook her head. Her hair billowed gently, while Saleen felt his heart sank to rock bottom.