Previously featured alongside producer Zavala as one-half of Dark Time Sunshine, Seattle emcee Onry Ozzborn recently forged a new collaborative partnership with fellow Emerald City spitter JFK. Together known as Grayskul, the rhymesayers make their first collaborative foray into the Booth with Zenith, a new single that’s every bit as moody and majestic as the fictional fortress from which the duo takes its name. Here, producer Smoke M2D6‘s grimy, driving electronic grooves set the mood as the emcees take aim at the homogeneity and mediocrity that currently dominate the game. This adrenaline-pumping selection is part of Grayskul’s forthcoming freshman set, also titled Zenith. Featuring guest appearances from Aesop Rock, Raekwon and many more, the project is slated to drop September 17, via Fake Four Inc.