For Merlin, the electronics were still pretty much magic, even though he knew there was no magic behind them. He didn't know how they did work. So all of them coming on at once made him nervous. He took a step back, but there were things behind him as well. No. Damien wasn't going to hurt him. He wasn't even trying to scare him. These things... were normal for him. He tried to calm his pounding heart and smiled weakly at the man.
"I, er... impressive," he gasped out. And the healing... that would be useful. He wouldn't have to worry about Uther taking his head. But... if he was caught, he'd still have to leave Arthur. And that would be worse than death.