This is an example of an Epic Simile. Also known as Homeric Simile, it is an extended version of a simile, but often taking several lines. It is more typically found in poetry as a way to emphasize heroism, turning it into an unmissable feat.
A simile is a figure of speech that compares two entities, usually with the use of words like "as" or "like". For example: "Your cousin is agile like a cat."
