The Master frowns right back, thinking of his Anetrizine despite himself. Thanks for reminding him, Doctor. "You want to sedate him. And how do you propose we do that? Slip something into his tea?"

Still, his mind is racing, taking in all the possibilities as he turns away, looking out through the bars and tapping his fingers against his thigh. Sedation-- impossible without an effective sedative and the means to introduce it. Neutralization-- same problem. Killing Daniel still seems the most likely to succeed.

"You mentioned healing devices," he turns back to Vala. "How powerful are they?"

In other words, how broken would Daniel's body need to be to kill the host in turn?