So...what are you saying? You want me to start drinking the blood again? That's the only way I can be strong enough to kill Lilith, nothing else will do the job. She's too powerful, and I don't know why I'm the one who can take her out, but according to Ruby, I'm the only one who can do it.
Incentive? What? He thought giving you another brother would make you scramble to comply with whatever he wanted? That's insane, Dean. This whole place is fucking nuts.