For the last few years, Nas has quietly been dropping some of the best work of his career. The legendary hip-hop artist still receives love for his revolutionary 1994 album “Illmatic,” but not enough attention is given to his recent output. Since 2018, Nas has dropped eight albums — five of these released in the past two years. Nas has been a musical machine, churning out lyrically adept, introspective and ultimately triumphant work that never feels stale. “Magic 3,” the third album in a series that started with “Magic” in 2021, is the product of an artist who knows he’s at the top of his game, even after three decades in the rap world.