Ehrgeiz, I can see that you're trying hard, thank you for that. Your English is still reasonable

Keep working on it and you'll get better. Here's what you sentence should have looked like:
"Have you read all that shit about the auras? Jopage didn't kill Cade, he... sucked out his aura (hmmm... not Jopaga but Rhue). Jopage said that auras can grow. That's why we see Cade in the credits - he's alive and his aura is growing. We'll see him again!"
So you see, not much needed to be changed
I think sucking out a person's Aura doesn't kill the person, but turns it into a mindless zombie like the creature you fought in his lair. Or maybe the creature had undergone some other experiments too, who knows. In any case, the other Arastotzi probably got Cade out when they escaped.