Xel is looking at Cesare, his face very, very blank behind its habitual, bland little smile. He isn't sweating, because astral constructs don't, and he isn't pale, as it's usually recognized, because they don't have any blood. He might be a little translucent around the edges.
"Thank you, Mikeru-san," he says evenly, all intentions of teasing him with Amelia's name (even if he wouldn't understand it) going out the window, "I am not going to be ill, and I'm not in pain." But I will be, he thinks, please, and is just on the verge of reaching for his body to slam it with magical lightning, but he remembers in time not to, for so many reasons.
And then he thinks, he's not in his body now. He could really hurt it and only taste the pain, not feel it, and if he doesn't act in malice his defenses probably won't wake him up. Which makes this the best chance he's ever had.
So, while he says, "And that was just what I needed to see, Mikeru-san. In the next few days, please practice calling up that feeling while you're by yourself, and see if you can... imagine yourself forming it with your hands, maybe," an etherial tendril is snaking down to his own leg, looping around the old break, the one that never healed right. And as he's livening his face up, making it smile a more animated smile to draw their eyes and saying, "For right now, though, I'd like you to--" he snaps the malformed bone in two.
He didn't expect his body to jerk and whimper without him in it, but it does, and the sweet relief of human agony floods the nausea of Miquel's bliss out of his system, like an inexorable tide of pure, clean water.
He's such a mess, he sighs internally, but keeps talking without skipping a beat, relying on their... distraction and his own animation to keep their eyes on his face, his voice to cover the quiet little noises, at least for now, as his ether goes to work vengefully re-shaping the bone, nearly clubbed in that once-broken middle from the way it was set and healed in place so badly. "--move in the way you would normally move from place to place--not walking, I mean, but the other way, just around the room."