A ghost.
3 seconds sound clip from the Mulan (1998) movie soundboard.
You can hear this line at 00:27:30 in the Blu-ray version of the movie.
Quote context
[...]
- I see you have a sword. I have one, too. They're very manly and tough.
- Who am I fooling? It's going to take a miracle to get me into the army.
- Did I hear someone ask for a miracle? Let me hear you say 'Aaah'.
- Aaah!
- A ghost.
- Get ready, Mulan. Your serpentine salvation is at hand!
- For I have been sent by your ancestors to guide you through your masquerade.
- Come on. If you're gonna stay, you're gonna work.
- So heed my word! 'Cause if the army finds out you're a girl, the penalty is death!
[...]