[action]
[ Duke's slowly looking a more and more confused, but his head dips forward a little. He's trying to figure out how Flynn can cast, but perhaps it was because they had found ways to use this new magic. Perhaps it was this location.
Either way, Duke is going to stretch a little, and then carefully make sure he's not going to trip himself on the chain.
A little stiffly, but he nods his thanks to Flynn, a slightly odd gesture that involves some twisting of the angle his head dips, so that a bit more of his neck is visible.
And then, as if he forgot that somethings might not be clear without words - ]