"You don't know my world," he warned him, darkly. This Master, whichever reality he was from, didn't know what life was like for the Doctor, had no idea how many people he'd lost before he'd reached this point, the point where he'd stand up and insist no more. "The Master, preaching to me about what's right? If you had any idea how ridiculous the mere idea of that is... You --" No, not him. But close enough. This was a Master he could actually turn his anger on, even if it was misplaced. "You tried to destroy humanity."