The final raid will start in the Tower. After beating The Black Heart , Atheon , Crota , Skolas , Oryx , Xylar , Quria , Xiro , Savathuns , Cabal's Emperor and the God of Vexs the Traveler will have no more ennemy on the system then we guardians will become useless for him In the tower you will have to face several strongs ennemy , some ultra kinds of robots and some guardians who doesnt want to believe that The Traveler is the Darkness itself. Zavala and Ikora will be raids boss , like a lot of guardians they will ignore the fact that the Guide and The Traveler are evil , so you will have to face them Cayde-6 will stay a good guy sadly his memory will be deleted making him becoming and useless Exo..... By the way you'll be prevented that the Traveler plan to destroy humanity by the Queen , The Stranger or Saint-14 himself. Eris Morn will still be good no matter what people thinks but she will trapped/killed by Zavala You will have to start from the Tower then find a way to enter inside the Traveler In the Traveler you'll find The Leviathan , a legend of Destiny's Lore , then at the end The final boss will be The Traveler and The Guide united as a final form, and the Darkness itself. Your ghost will stay a good guy till the end but killing the Traveler means you kill his spirit which is gonna make the saddiest scene of all Destiny game. After that a sad music will be played ( Destiny remembrance , see on youtube) leaving you alone In the Tower with the last good guys left and humanity ( Cayde , maybe Eris , The Stranger , Banshee , Rahol etc.... This will be a really brillant and sad scene. ) There will be no more Vex , no more Fallen except on the Reef but good guys , a little bit of Cabals but far from us and with no Emperors , no more Hive and finally no more Darkness! You'll become the next chief of titans (as the titans are master race and the main Guy In the Story is used to be titan, Cayde chief of Hunters and Eris chief of Warlocks , you'll form new guardians for a better future... And at the very end You'll all will be around a fire with Dark Vador burning In it with this music : http://m.youtube.com/watch?v=np6vAuS0KNs Enjoy your year 4 Gjallarhorn !