Epic simile:
Epic simile is a formal and
sustained simile. Like a regular simile, an epic simile makes a comparison
between one object and another using "like" or "as."
However, unlike a regular simile, which appears in a single sentence, the epic
simile may be developed at great length, often up to fifty or a hundred lies.
It is called epic simile because the epic poets introduced the tradition of
such similes.
Example of epic simile:
In Book-XII of Iliad Hector has been compared
to a boar and a lion:
“He was like a wild-boar or a lion when he
turns this way and that among the hounds and huntsmen to defy them in his
strength.”