Final answer:
The poet uses personification to describe Higle's death, as the sword is given human-like qualities.
Step-by-step explanation:
The literary device referenced in the excerpt from the poem about Higle's death is personification. The sword is described as being able to 'reach out' and 'drink Higle's blood,' as if the sword had a will or agency of its own. This is distinct from both a simile, which would use 'like' or 'as' to compare two things indirectly, and a metaphor, which would state that one thing is another to draw a direct comparison. There is no direct use of alliteration, which involves the repetition of initial consonant sounds, in this specific line.