In "The Raven" By Edgar Allen Poe, repetition is the device that plays a larger role. He uses it when he says, "Nevermore." It plays a larger role because when the raven kept repeating "Nevermore" it made him realize that Lenore is never coming back.
In "The incident in the Rose Garden" By Edgar Allen Poe, irony is the device that plays a larger role. He uses it when he says, "Sir, I knew your father, And we were friends at the end." It plays a larger role because death is explaining that he knew his father, which means he took him & now he was going after him.