"Are you sure that's good for him?"

Castiel was asking about Dean. They'd kind of stuffed him in the Impala's trunk after he fainted. Vera was driving, River was shot gun, and Crowley and Castiel were sharing the back seat. The Demon scoffed at Castiel's question.
"Worried about Lover Boy?"
"I don't understand."
"Will you two shut up!" Vera barked. "Crowley. What did you show River?"
"Rowena's life time. Missouri helped me mind you."
"Missouri wasn't there! Now, I assume you showed her Rachel's life time?"
"Ah..."
"Whose Rachel?" River asked.

Vera shot a glare at Crowley through the rearview mirror.
"Someone Demon Boy and I failed to protect. The you of this time. You weren't able to encounter Sam. But you still died young. I'd say it be smart to show you a segment before one of Lucifer's loyal does."
"Like his Bride."

Vera exhaled and glanced at River.
"She's no longer a variable."
"Lucifer thinks she is." River shut her eyes. "Normally when I pass out I connect to Sam's mind. Since he's not there I ended up speaking to Lucifer. He said a lot of confusing things and tossed a red stone at me..."
"Ruby." Vera sighed. "Dead."
"Ah..." Crowley tried to speak up.
"He says if he unites with her while controlling Sam, Sam's soul will blink out."
"Unites or becomes one with? Significant difference." Vera added. "His bride is still dead."
"Well...that could be temporary."

River was relieved they hadn't been driving when Crowley said this. Vera had flipped around and fury was flooding her mind, overflowing enough that River could read it.

"What do you mean Demon?" She snapped.
"I mean..." Crowley exhaled. "Lu could use Blood Red Moon ritual."

A dead silence filled the car, but River could read Castiel.

How could Lucifer use it? There's no recorded success of it working. In order to resurrect a Demon with it, the human casting it would have had to ingest Demon Blood...oh.

"Lucifer is controlling Sam and so he can use the ritual to resurrect Ruby." River stated. Vera exhaled and went back to driving.
"That's the tip of the Ice Berg. There's also the Demons that Famine sent after him, Lilith's cook..."
"Lilith?" Crowley asked and River could hear pain twisted with hope.
"Sam never drank her blood." Vera stated. "I was more worried about Azazel."
"No." Castiel hissed. "Damn it."
"He and I have issues from way back." Crowley stated. "Back when I was just a human. He didn't like that Lilith, Lucifer's most devoted follower, favored me."
"How long do we have?" River asked as they pulled up to Missouri's.
"It's the second New Moon of a month."

River stared up at the full moon in the sky. When she'd arrived there'd been no moon out.
"A fortnight."