Not necessarily fear-inspiring words, but good.
Sandman Comics, #9, "The Kindly Ones," Ch. 12
Delirium to Mazikeen:
"Hmph. If you don't let me in, I will turn you into a demon half-face waitress nightclub lady with a crush on her boss, and I'll make it so you've been that from the beginning of time to now and you'll never ever know if you were anything else and it will itch inside your head worse than little bugses."
Delerium got in, but 'cause the boss (no, I won't say his name. Go read it yourself.) wanted her there.