The sound of his claw's attack was all Rio need to know that his attack was successful. As he slowed down to survey they damage he saw that one was taken out and the other two were worse for wear. His attack seemed to have angered one the undead soldiers seeing as it had followed him and was now in the process of attacking him. The attack were sloppy and uncoordinated, reminding him of drunken louts trying to fight. 

The kid shouted about them being weak to fire, but Rio didn't have on him any method so he'd leave it up to the others like Arwyn who was launching a fiery projectile to his side at the same undead. Rio took advantage of such sloppy strikes against him to use his gauntlet to secure a good grip on one of its arms and use that momentum of the sloppy punches to stagger it forward towards the fiery arrow's path.