He is trying to frighten you—a sure sign that he is frightened himself.
Because if it's just you alone... you're not as much of a threat.
Threats, promises and good intentions don't amount to action.
— Have you ever embraced someone dying of plague, sire?
— No, but if you interrupt me again, I assure you that you shall.
— You know, if Morgana doesn't kill you, I will.
— Threatening your king is treason, Merlin.
— How about threatening an ass?
— Heard that!
Snootch to the motherfucking nootch! Go back to your paper routes, you Mighty Duck Fucks!
Only a fool makes threats he's not prepared to carry out.
— His Grace is growing fond of you.
— I can tell. He only threatened to behead me twice.