There's a moment where Strange debates telling Billie that surprise, he can generate electricity. However, as she steps up close to him, there's a brief moment where Strange's fight or flight instinct kicks in. He holds his ground and listens as Billie describes her hypothetical situation.

That sounds utterly preposterous and like a terrible idea. He'll do it.

"I don't know that sort of magic myself—scrying is only good for viewing, not communication. But it is theoretically possible. Dragonborn have a mental connection to the parent dragon. Obviously we don't have the physical signifiers of the dragonborn of old, but I suspect we've been changed enough that we could try and focus on that connection."