This is the evil force that has been attacking her.
3 seconds sound clip from the The Mummy (1932) movie soundboard.
You can hear this line at 00:40:13.846 in the Blu-ray version of the movie.
Quote context
[...]
- You also know that you must return that scroll to me or die.
- Now tell that weak fool to get that scroll, wherever it is, and hand it to his Nubian servant.
- So you have made him your slave.
- If I could get my hands on you, I'd break your dried flesh to pieces. But your power is too strong.
- This is the evil force that has been attacking her.
- Burn the scroll, man. Burn it!
- It was through you this horror came into existence.
- Your father destroyed the scroll, knowing that it would cost him his life.
- Isis, the Egyptian symbol of life. I meant it for your father.
- What good could that old charm have done him?
[...]