And... how big is the room? The spell may not fill the room, or they may have a counter... AKA, a back way out and just avoid it entirely. Then, you have 20+ wights on the streets since they've been discovered.<br/><br/>The question is then, what can the others do to kill them? They can't move into combat range. Does fire actually hurt them? All of those spells have resistances and who knows. They may be very useful when they come back to deal with the wights.