In grendal, what poetic device is used in the phrase "ragged little bands that roamed the forest on the foot"

alliteration  

Explanation:

In the novel, 'Grendal' , the poet uses the phrase, "ragged little bands that roamed the forest on foot" Grendal was a character in the novel that looks like a beast who roamed on the forest on his foot. To describe this effect, the poet uses "alliteration".

Alliteration are used for the same letters or sounds within a different word which exits in one line.  From the phrase, it can be seen that 'ragged' and 'roamed' are similar words which expresses the use of alliteration. Its uses is limited to the wordplay so as to keep things interesting for the reader.

the answer is somber