Seems sorceresses are all the same, across the many worlds. He's never known one who didn't want to be in control of a conversation. He considers her for a long moment, then signals the waitrat for more wine.

"'Battery' was the wrong word," he says, finally. "Though I guess they could be used like that. Where I'm from, a Source is someone born already imbued with that power – creation, destruction – in their blood. Immense power. Uncontrollable, usually. The kind of power that can destroy a building, or a city, or maybe even the whole world. Has a tendency to leave the person themselves catatonic."