The Doctor tried to focus past the haze to the Master’s face. He had one of those looks of his; hungry, wanting more and more like he always did because that was the sort of man he was, despite all the chances to be something better. His vision swam. The Doctor tried to blink it back into focus, thinking he might have it in him to start rambling again – it took him by surprise to realize that no, he didn’t, and in fact whatever energy he had left might be put to better use trying to do his part in all this than word games. Not that he didn't like word games. Time and place and both time/place today were...not good.

Besides, he had feeling he knew what Sobek meant by “proof”.

He didn’t doubt that the Master could do it. Enslave a few planets here and there, amongst other things, and this was really quite a small thing. But he hoped the Master would at least not leak silly things like Gallifreyan technology or their long, boringly deadly history to a beast like this God.

For once the Doctor didn't start rambling about anything under the sun. Instead his eyes just slid from Sobek to the Master, fixing on the other Time Lord and for a moment there was a flicker of that old spark, almost as if he was challenging the Master to do the right thing.

What the "right thing" was, well. Bit of a gray area there. In that plan turning into Plan thing, hopefully.