Erhart hisses in pain as the toxins continue to rip through his body, forcing a lot of the time his enhanced form spends strengthening him for battle instead to deal with the varied problems that this is causing him.

When he sees the swath behind them open up safely, he'll try to shoulder-rush Heigan there, following behind, a sort of brutal bull-rushing tactic to dictate the "dance" of battle, smashing him aggressively back if possible so he can dictate the pace of events.

Erhart has realized that this is a question of strength and determination against magic, so he's doing his best to use a physically brutal and bullying style to his advantage in achieving victory.