"You saying you're a Winchester?" Sam scoffed at that. Really. It made sense. he knew that. It made a lot of sense, actually. It definitely explained why and how Nick was able to hold Lucifer for so long. He did eventually start to deteriorate, though all signs of that were gone now. But he'd held up far longer than any of the others.
"I thought it was the merge of the Winchester-Campbell line that made us ideal candidates." Although that theory was also flawed because Adam had held up with Michael riding shot gun. And in hell. But Adam was already dead when Michael got to him, so there were extenuating circumstances.
Sam was getting a headache just thinking about it.