Nightmare Emissary says 'Leave this realm at once, mortal. If you value your life even a little. You do not want to anger the [master].'
You say 'master'
Nightmare Emissary says 'I am but his emissary. You are, as of this moment, of no consquence. [sic] A word of advice, mortal. Stay away from Hiljorin. If you do not, you and I will be forced to meet again. And you will not enjoy it.'