Lightning-based mana. It was an understandable mistake. Lightning was power, and angels had the ability to control that kind of weather if they were high enough in the ranks. There was a reason that it usually smelled of ozone whenever an angel arrived somewhere.

Not that Castiel had even a shred of that power now. "This computer runs on electricity," he clarified. "It's also used for lights."

Not that there were many lights on in this room, but still, Lloyd should know what he meant.

That was probably enough of talking about energy sources and computers, though. Castiel stood up and stretched. "I'll start searching through the rest of these texts," he said, as it seemed that Kratos and Lloyd had things under control here.