Not a question but how was your day?

When grendel speaks of unferth and says "i could crush him like a fly" what literary device is being used

Can someone explain this to me clearly plz

What is the best way to brainstorm ideas for an argumentative essay? generate ideas for both sides of the argument compile a list of possible sources for the topic list descriptive details that illustrate the main argument craft a strong thesis statement that is the focus of the essay