A theory I came up with about the cabal and the darkness [spoiler]the darkness was being beaten by the traveler in every way so the darkness devised a plan. It would split its power among the races and control them all. The vex got the black garden's heart whom they worshipped so the darkness helped them and led them, the hive got oryx whom they also worshipped and oryx protected them, the fallen got whirlwind. The fallen didn't treat the darkness as expected the fallen still sought after their beloved great machine(traveler.) the darkness punished the fallen by banning them from their home planet and casting them into anarchy. The cabal's version of the darkness is unknown but obviously they saw what happened to the fallen. The cabal seeing this chased the fallen's great machine to Mars destroying planets already controlled by the darkness. Once they reached mars the traveler was on earth and the tower controlled it. The cabal like the fallen are trying to obtain the traveler and plunge out the darkness. [/spoiler]