On the subject of shifting forms— [pauses. there's a flicker of something, and then Loki appears to be, for all intents and purposes, Starscream's exact duplicate. Loki continues, in Starscream's voice] — I should say that it is possible. The matter of souls is something else entirely, but believe me when I tell you they exist, and that one may have some power over them.

But what you speak of are ends, not beginnings.