So the majority of you reading this must already know about Oryx, Crota & Nokris from the pillars on the mission "Regicide". When you enter Oryx' room at the end of the mission there is a black pool where he dies in the cut-scene after you defeat him, look around edge of the pool and you'll notice carved pillars just like the ones that tell you about Nokris. The strange part is that there are 4 pillars not 3... Perhaps this is a subtle hint that there may be a fourth Hive Prince or at least another important figure to the hive? What are your thoughts?