The shadowy hedgehog has no reaction to the short, clipped threat. None whatsoever. The amused smile he's wearing doesn't alter in the slightest. As Shadow moves away, though, Mephiles gives another of his sweeping bows, though this one is a little shorter, if none the less graceful.
"Glad to be of service to you, my other~" he says, softly, voice like silk.
The burst of energy and light and Mephiles finds himself alone once again. And he cannot stop the chuckle that wants to build to laughter. Doesn't bother to fight it, letting his mirth fill the empty room, before it tapers off again and he eyes the door, amusedly.
"Oh... we shall meet again, my dear Shadow~ Again and again and again~" he murmurs, softly, to himself, and heard by no one but himself.
"I have already planted enough curiousity and trust in you to ensure that you will come back to me~ It is only a matter... of time~"