After helping secure Sloane and Commander Zavala on Titan, it is time to travel to the Vex infested centaur, Nessus. This lush world is reminiscent of Venus from Destiny, but with far less human civilization. Instead, the Vex have taken over everything and rebuilt the tiny moon in their own image.
When you first land on Nessus, you will be on top of a giant tower. Enjoy the view and jump into the weird tractor beam below, which will carry you safely down to the ground. Once you land, walk around the right edge of the ridge and make your way over the Cayde-6’s crashed ship. Hop onto its destroyed hull and scan the tiny monitor on top. A mostly cheerful voice will begin chatting with you about Cayde-6, but after long, the voice will make it apparent that she has a crossed wire or two. Meet Failsafe, the failsafe AI of the Exodus Black colonial ship.
One you have met your new friend, walk away from the ship and back toward the tractor beam. But instead of turning left and heading toward the spire, turn right instead and follow the path. After a couple of rights and a left you will find a giant cistern in front of you. Descend down it and walk toward the glowing orange lights. Make your way into the arena where you will first encounter Cayde-6.
Before he can get a word in, Cayde-6 will be teleported away and a massive Vex army will begin to rush you. If you are unfamiliar with the Vex, their critical spot is a little different than other enemies. Instead of shooting them in the head, you want to shoot them in the glowing white square on their abdomen, commonly referred to as a “Vex Juice-box” in the Destiny community. Defeat the Goblins, Hobgoblins and Minotaurs that make their way through the Vex gate. Once they have all been defeated, follow your objective marker into a well-lit section of the cave.
Attempt a rescue
Follow the winding path and crawl through the crevices until you reach the Sunken Cavern. Continue forward and you will eventually discover a giant, open space with a lot of platforms to climb on. Stick to the right side and platform your way down. Once you reach the first landing, you will have a small group of Vex to deal with. Take them out and continue your decent into the cavern, hugging the right side of the wall yet again.
On the next landing, walk through the triangular doorway and into the round room. There will be a swirling Vex gate in front of you. Walk through it. On the other side, you will be in a small, rocky area. Jump along the rocks, sticking to the left side. Once you reach the Well of Giants, you will find yet another triangular doorway that leads to a much larger tractor beam. Jump in and float down into the well.
Once you land, you will find Cayde-6, which is very exciting. However, Cayde-6 will be in a spot of trouble, as he is currently being guarded by a Vex Hydra: Hapax, the Convergent Mind. Wait for the shield to spin around the miniboss and shoot it in its big, red eye. Be careful of the smaller Vex units that it summons in and take the fight slow and steady. Once you drop the Hydra, have a word with Cayde-6 to end the mission.