The amusement and ease vanished from the Master's stance and expression when Jack shot him, a snarl crossing his face.
"I do not take orders from someone like you, Harkness," he hissed. "I didn't ask to be in this miserable excuse for a pocket dimension, and while I would prefer the broader universe and a proper chance at the Doctor, if I must need make do with this place, I shall. As for regenerations..." He smirked. "It doesn't matter if you force each and every one of them I have. I have more resources than just that. I might be a little miffed to see this face go, but you can't get rid of me quite so easily."