When Grendel speaks of Unferth and says, "I could crush him like a fly" (89), what literary device is being used?

the literary device that being used when Grendel speaks of Unferth and says "i could crush him like a fly" is : Simile Simile is a literary device that used when the writer compare something with another thing that is completely different. In this case, it compared a person with a fly