He's not quite grime, not quite Afrobeats, not quite dancehall—instead, this North London MC has been at the vanguard of a new wave of diasporic British rap since his 2014 breakthrough. Mostack floats over the breezy, Caribbean-inspired “Let It Ring” and joins a murderer's row of innovative UK rappers on Steel Banglez' steel-drum-heavy “Bad.” And on the cheeky “What I Wanna,” he takes a sampling note from Big Pun's book and shows off his sense of humor: “I'm a hustler, I thought you knew that/ I could sell a Biggie Smalls album to Tupac!”