You know, being all alone with a delirious creature does terrible things to your mind. Aurae should know that, since he's experiencing it firsthand. Riven isn't the best thing to hang around. As Aurae held onto his bleeding right arm with his left hand, Riven stared at him. All her eyes are full of amusement, and it creeped him out. Her legs(tentacles?) are next to her, her intimidating presence heightened because of them. They're, in fact, the appendages that stabbed his friends to death.
Aurae's fireteam are nothing more than mutilated bodies that laid next to him along with crushed ghosts. V, his own ghost, watched in horror as this took place. Riven's appendages haven't made a move to kill either Aurae or V yet, maybe to add a heavier survivor's guilt onto Aurae's shoulders. He already felt terrible not being able to save a lot of people during the Red War, now surviving against an Ahamkara with the death of your friends in mind? It hurt much more, especially when they were the only ones that could look past the titles he had. Hero of the Red War, even just plain Guardian, or maybe the next Shin Malphur(a joke from a friend).
They both looked at who he truly was, a guardian like everyone else. One that's hurting inside, and they've helped. Now they've suffered a gruesome death, and he blamed himself for it. Turns out, half their fireteam were traitors. They tricked them, then left, leaving Aurae and his two friends to fight Riven by themselves. They couldn't escape, they died, and Aurae's still here. Why isn't he dead yet?
"So, Hero of the Red War, do you have a wish?" Riven's voice boomed in the dark room.
Aurae's grip on his own arm tightened, then he gritted his teeth and hissed, "I don't need your help, Ahamkara. I don't need power, wealth, or anything else. I just need to end you, and I'll get rid of everything here til' everyone is safe from things like you."
Riven let out a guttural laugh, "I am immortal, you can't kill me. I suppose I'll just have to find out your desire then."
"Brother slayer, what do you desire? Power? Riches?" Riven droned on with an almost teasing tone.
"I want my life to-" Aurae retorts with sarcasm, but little did he know, that the Ahamkara took it very seriously.
Riven interrupts him mid sentence, "Perhaps I can grant your outlandish wish."
Before Aurae could complain that Riven didn't let him finish his sentence, the darkness on the ground started crawling towards Aurae. All he could do was stand there. The darkness stuck to his body, leaving him tied.
"I hope you find out what you want in this new world." Riven said with a smile full of sharp teeth.