Can't wait for Danny Brown's new album, Old? Well, thankfully the Detroit spitter is staying on top of his feature game. But it's not just that he's been spitting on tracks by artists from Joey Bada$$ to The D.O.T.; Brown's been destroying his verses. Case in point: His guest appearance on U.K. producer The Purist's "Jealousy." Also, that Biggie sample? Perfect.