This induced a sense of dizziness and nausea in his enemies. So far, Gabby had not come across someone who was able to dismiss his illusion.
To be fair, what Gabby called an illusion was not an illusion but a sonic attack in reality. Zavier who was well versed in illusions could tell at a glance what Gabby was trying to replicate. Therefore, he focused all his spiritual energy and mobilized it towards his auditory senses in order to strengthen them. The illusion broke apart like a sand castle on the beach that had been run over by tidal waves.
Macbeth on the other hand was about to engage in close combat with Zavier; something he was very good at. He wielded his long sword and took quick strides towards Zavier.
This was a common tactic that he and Gabby had come with during their long tenure together fighting as a team. Gabby would disrupt the senses of the opponents and he would rush in to deal deadly blows to the unaware enemies.