CASISDEAD is the masked alter ego of the stern rapper and producer previously known as Castro Saint, Castro, and Cas. A native of London, England's Tottenham district, the artist debuted during the mid-2000s. He went inactive after a couple years and then returned, ultimately switching to the CASISDEAD alias, supported by a multimedia crew called the Dead Team. The earliest nightmarish narratives from CASISDEAD were summarized on The Number 23 (2013), a mixtape with a diverse set of productions highlighted by the sleek "Leon Best." An EP-length set entitled Commercial 2 (2015) featured retro-futuristic synthesizer-driven material sourced from the likes of Chromatics and Glass Candy.