He wanted to destroy everything.
2 seconds sound clip from the The Secret of NIMH (1982) movie soundboard.
You can hear this line at 01:09:23.675 in the Blu-ray version of the movie.
Quote context
[...]
- It was you. You did it. You killed Nicodemus. That was no accident.
- He wanted to destroy everything.
- I've learned this much: take what you can when you can.
- Then you've learned nothing.
- Friends, tonight we journey to Thorn Valley.
- We will leave no tracks. No evidence that the rats of NIMH ever existed. Come.
[...]