After Cam's magic but still basically human boyfriend has fallen asleep and Cam finds he is not tired enough to do the same, Cam goes downstairs.
He only flinches slightly. "Okay. Ah -" He is attempting to get this person murdered mostly because he wants to know exactly how invulnerable Cam is, is that fucking evil enough for you - "Imperio -"
"Going to go check. Do you want - some way to track what's going on - I'm not afraid of him but -"
"We don't have them all mapped out, but it might be, would putting it in a wood box interfere?"
"I don't have that working yet. Would you expect to be able to do something, or stop doing something, if you were in distress?"
"Could have someone else on standby I could dismiss as a distress signal. The technologies might work, it's not Hogwarts and it's not a place like it..."
"Dismissal takes a minute. ...Snapping a binding is instant, if you'd trust any of your angels that far."
"...sure, Anglican church lady's a sweetheart - is snapping a binding externally visible -"
"Externally no but reportedly it feels like something even if the binding wasn't tight enough to feel like anything itself. Might make more sense to have your angel in range to rescue you if you snap her binding rather than here as a communication device."
"If I'm conscious at all I can solve most problems with the demon I have under my control, but all right, I'll go ahead and set up a fallback or two. Microphone in case it does happen to work?"
"It'd have to not only work but be able to send signal through Hogwarts, but all right."
"...yes. This is just a nonstandard way to bug someone. Apparatus amended." He waves his hand.