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21 Savage teamed up with record producer Metro Boomin on the collaborative mixtape titled "Savage Mode." This project, released in 2016, gained significant popularity and critical acclaim, showcasing 21 Savage's lyrical prowess and Metro Boomin's distinct production style. The mixtape's success solidified 21 Savage's position in the hip-hop scene and further propelled Metro Boomin's reputation as a sought-after producer.