At the city: a guardian named cayde rises through the ranks of crucible, or pve. The vanguard look into this and demand that the guardian reveal himself to them. They realize that it is Uldren Sov. Ikora picks him up and prepares to throw him. Zavala stops her obviously and says that something is different. He gets interrogated but they don’t see his memories and so think that he is pure. They send him out on a mission of he does extremely well. He becomes a spy because of his ties to the underworld of Corus... this isn’t Star Wars. He becomes Vanguard against Ikora’s will. He is captured one day and returns looking entirely normal. But really, Uldren has been told of the evil deeds done by the Traveler. He becomes a double agent and sabotages the Vanguard and Consensus from the inside. When the triangle ships arrive, Uldren blows up entire sections of the wall. The city and its members helplessly fight against the ships, the hive, and cabal who have also conspired with the ships to attack the city. Many guardians are forced into hiding and will not be able to regain control the city. They create a new city though. Some of the guardians turn away from the Light and become dark guardians. They travel to a distant planet that is inhabited with dark beings. They mix and become the current day Sit... forgot this was destiny again. They find powers elsewhere that are much much stronger than their original powers.