I do not understand what you mean but I will try to answer this to the best of my capabilities and too what I found.
Answer: The alliteration and imagery in these lines create a feeling of suspense and danger. The repeated "b" sound in "blood-stained blade" and "bright blade" creates a sense of foreboding, while the images of the "fierce foe" and the "fatal fight" add to the sense of danger. This makes the reader feel as if the battle is about to take a turn for the worse.