“What’s to be done? Break what must be broken..” What literary/rhetorical device is this?

Hi, you've asked an incomplete question lacking options. I inferred you want to know the type of literary device or rhetoric used in the sentence.

Repetition, and Parallelism

Explanation:

Repetition is a type of literary device that involves the use of a word or phrase several times (repeatedly) in a speech or sentence. While Parallelism involves the use of phrases with grammatical structure, which may create a  pattern or rhythm.

For example, in the above sentence, we can observe the repetition of the word, "What", and "be". And the sentence, "Break what must be broken" has a similar grammatical structure as the first sentence.

to inform the reader that the text will take a second look at the grimms’ original tales

i think they are preparing for the battle of gaul. : )

i hope this you! : )