Matthew Sean Leon (born January 30, 1991) is a Canadian recording artist and record producer from Toronto, Ontario. He is the founder of the IXXI Initiative, formed in 2012 in Toronto. In July 2013, Sean released his debut mixtape Ninelevenne, the Tragedy followed by his second project Narcissus, the Drowning of Ego on January 22, 2014.

Shortly after the release of Narcissus, Sean began the year-long roll out of the compilation King Of The Wild Things. That same spring of 2014 he introduced us to and began campaigning for the highly anticipated Black Sheep Nirvana.