Ian had anxiously been awaiting a response from the 'good' professor and yet none had come. He supposed that perhaps they were going to have to confront this creature. How exactly did one confront a troll? He did what came to mind first.

He pointed his wand at the place in the floor in FRONT of the troll. HEY EVERYONE! If we freeze the floor, maybe the big oaf will trip and fall and we can overpower it as a group? It was an idea right?

He didn't wait to see if anyone would join him. With as much concentration as he could muster he yelled out GLACIUS!!! and watched as a one foot by one foot circle of ice formed on the floor before the beast.