text: is now the devil ... so says
  
  -- the guy she used to bang.
  
  Take a close look at this video ... Drake is singing "Days In the East" -- Monday night in Toronto during his OVO Fest -- when a fiery 6 appears, followed by an image of Rihanna, followed again by a 6, then another Rihanna and a 3rd 6.
  
  It's unclear what turned Rihanna from
  
  into a satanic symbol. Drake has trashed her here and there, but it's one thing to have beef with your ex, and another to call her out as the devil.
summary: Rihanna is now the devil ... so says Drake -- the guy she used to bang.Take a close look at this video ... Drake is singing "Days In the East" --…