* Personification: The mocker is given human qualities of "pouring out his repertoire" and possessing "blissful unawareness." This gives the bird a more active and deliberate role.
* Allusion: "Mocker" likely refers to a mockingbird, a bird known for its mimicry. This alludes to the bird's ability to imitate sounds, suggesting that it might be mimicking human voices or sounds, adding a layer of meaning to the sentence.
* Suspense and Mystery: The sentence leaves the reader with unanswered questions. Who is being mocked? What is the bird's "repertoire"? This creates a sense of intrigue and makes the reader want to know more.
* Imagery: "High above us in the darkness" creates a vivid picture of the bird's location and the surrounding atmosphere. This contributes to the overall mood of the sentence.
Overall, the sentence uses a combination of these literary devices to create a captivating and evocative image, inviting the reader to imagine the scene and ponder the significance of the mocker's song.