According to Brian Baldinger from the NFL Network, in order to be a dynasty, teams need to have a few things.
Elite level defense
The Ravens defense has been the standard of NFL play since the early 2000s. With big time players like Ed Reed, Ray Lewis, Haloti Ngata, C.J. Mosley, Jimmy Smith, Lardarius Webb, and so many others, Baltimore's defense has no shortage of star players. Consistently a top 10 defense despite multiple defensive coaching changes over the last decade and a half, the Ravens have just been one of the NFL's best for so long.