"If you won't explain, can I watch?" he cajoles. And there's very little in the way of ulterior motive here, really; he seriously doubts Joker can do Gaav any damage that'll make him need to step in.
"They're not good, blues," Xel says, a little sulkily. "If I hadn't seen what it looks like when the balance of Lords goes to hell, I'd start planning to kill Dynast-dono today." He gets an intrigued little smile, a lift to his lips that would have been a delighted laugh at another time. "How did you trick them?"