If you follow Eric Prydz, you most likely know his darker alter ego Cirez D. Famous for a techier, darker sound than Prydz or Pryda, his releases usually come in no form at all, rather in the form of ID's. But as Prydz has taken 2014 as the year to officially release music, it seems like his alter ego is doing the same, by releasing his first single in years entitled "Ruby." Due out on October 13th via the resurrected Mouseville Records, "Ruby" is surely the culmination of the live performances like EPIC 3.0 at Madison Square Garden, where we saw Prydz take on this persona live. Check it out below.