Welcome, I'm only known for my Cabal theory but I'm here to add on to it. In the various Trials of Osiris armors, the flavor description speaks of the Speaker, mostly conspiracies about him. In Egyptian Mythology, Osiris was exiled and framed by his evil brother to take his throne. Osiris, a once esteemed warlock, mastering in the darkness was referred to when the vanguard needed information. Now here's where my theory comes in, the 'Speaker' was the one who framed him. There could be a point where Osiris saw through his ruse, evidence from the armor flavor texts state that the speaker turns allies against each other and has no real purpose but gains the respect and admiration, Osiris attempted to remove him and therefore was framed, saying he had become to attached to the darkness. More evidence is that Osiris was obsessed with the shrine of Oryx, gaining priceless information from it, suddenly the speaker calls upon you to destroy it, could the speaker be working with the darkness? Maybe his started the trials to find the strongest of the guardians to recruit them, gift them and prepare them to fight other guardians who have been lied to by the speaker. I'm ending here, might add more later, I just needed to write this down before I forgot haha. -G.I.