"Good... that ought to hold them for the time being." Kain does exactly as she says, eager to be rid of these creepy spirits. He draws his sword to strike the trapped spirit. It's so much easier to handle them when they're not wildly flying all over the place. That one dealt with, he looks to see where the others are being drawn to, heading over to help out Garahel with dispatching them once Inessa's spell takes effect.