[Gale's hit it on the head, but Astarion still recoils from his fears being seen so clearly, painting them in such a stark light. Of course he's not worried about that. Why would he be worried?]

Darling, I'm not just going to kill Cazador. I will destroy everything he stands for. I will take everything that he wishes for himself and make it mine.

I will remove him and take the ascension I deserve.