Grayskul is an American hip hop duo based in Seattle, Washington, consisting of rappers Onry Ozzborn and JFK Ninjaface, both members of the Pacific Northwest hip hop collective Oldominion. The group was formed in 2003. After opening for Eyedea & Abilities, their music gained the attention of Rhymesayers Entertainment. Grayskul made their label debut with Deadlivers (2005), featuring guest appearances from artists such as Canibus, Mr. Lif, and Abstract Rude, and including the track “Secret Wars” with Oldominion members. In 2007, they released Bloody Radio, with Onry Ozzborn and JFK adopting the aliases Count Draven and Count Magnus; the album featured guest appearances from Cage, Slug, and Aesop Rock. In 2009, Grayskul collaborated with producer Maker to release Graymaker on Taxidermy Records, followed by Zenith (2013) on Fake Four Inc.
