Sorry if the constant POV changes and time jumps gets confusing. Mid-way through this chapter, it all comes together and there'll be no more jumping around. Protective!Dean fans, this one's for you! P.S. Chapter title from a Fall Out Boy song. (Love them!)

Dean stared at the empty wall where Metatron had been moments ago. He slammed his fist on, no, through the wall.

"DAMNIT!" He shouted as he pulled his fist out of the newly formed hole. His hand was spattered with blood, some of it his, most of it Metatron's.

"I'm sorry, Dean-"

"Shut up Cas! Just get me back to Sam!"

"Dean, we need to be prepared to fight. We can't simply storm in there. We have to wait for the appropriate time."

"Fine, Cas! Just take me back, damnit!"

Castiel sighed at Dean's outburst and reached out to Dean's head.

Dean opened his eyes and found himself back in Boise. Only this time, he wasn't right outside the warehouse, but he could see it in the distance.

"What the hell are we doing here?" Dean spun towards Castiel.

"If we get any closer, Gadreel will be able to sense our arrival."

"How are we supposed to know when to get in there?"

"I thought we ought to wait a few minutes and then-" Castiel was cut off by a bloodcurdling scream coming from the warehouse.

"SAM!" Dean started charging to the building.

"Dean, stop! We need to wait until-"

"Until what Cas?! He might not even be alive right now! I don't give a damn if he knows I'm coming! Let him know, cuz I am coming to kill that son of a bitch tonight! Now, TAKE ME, TO SAM!"

Dean didn't even notice Castiel placing his fingers above his brow.

When he looked at the scene unfolding before him, it made Dean's blood boil.

Gadreel was towering over a terrified and shuddering Sam. He was crushing Sam's arm, which appeared to be broken, under his foot. Gadreel's apathetic voice made Dean shudder.

"I truly am sorry, Sam."

"No you're not, you lying bastard!" Dean screeched in his mind. He silently approached behind Gadreel who was too busy torturing Sam to see him.

"But you are the only one capable of reopening the gates of heaven."

"Crap, Sam's never letting that go now."

"I cannot go back there."

"Now, Dean!" His mind screamed.

"No, you can't." He said stepping out of the shadows. He swung the blade and felt the resistance as it met flesh with a satisfying squish. "Cuz you're gonna burn in hell."

Dean pulled out the sword and looked down at his baby brother. A glint of hope gleamed in Sam's eyes.

"Dean."

"Sammy!" He let the sword clatter to the ground and bent over to Sam's side with Castiel right behind him. "Oh, God, what did he do to you?"

"I don't… suppose you'd… believe me if I… I said… I was fine." He joked wearily. He tried to let out a chuckle, but it turned into a series of coughs accompanied by blood dripping out from his mouth.

"Cas, do something!"

Castiel bent besides Sam and put a hand on his head. He waited, then stared down at Sam in confusion.

"I'm sorry, Dean, I can't heal him."

"Why the hell not?!"

"I don't-"

"Gadreel." Sam breathed out.

"What?"

"Gadreel… said he'd… make sure no… no one could… fix me."

Sam then mumbled something about 'only one.'

"What?" Dean asked.

Only some of Sam's words were audible. "I'm… only one… can... open heaven?"

Dean swallowed, feigning the tears in his eyes.

"Sammy, that doesn't matter right now. We're gonna fix you up okay? But you gotta keep fighting, man. I know it seems like I think you're not strong enough, but that's not true Sammy! I know you can handle doing stuff on your own, but I… I can't Sam. I need you." A lone tear finally fought its way through.

"How?" Sam's voice quaked.

"'How' what?"

"I want… to keep fi… fighting Dean… but… how?"

Dean smiled as tears of joy leaked out.

"How bout you just try to stay awake for now?"

"So… tired Dean." Sam eyelids started closing sluggishly.

"No, Sam, c'mon! You gotta stay awake!"

Sam tried to obey, but his whole body was so exhausted, and he finally succumbed to darkness.

"Sam! Sammy!" Dean lightly slapped Sam's face trying to wake him. "Don't do this to me, Sam!" Dean's voice quivered as he tried not to burst into hysteria.

"Cas, please, you gotta do something."

Castiel thought unblinkingly for a moment.

"There is one thing we could try."

"What? Anything!"

"We could try to extract some of my grace and give it to Sam. The grace could potentially heal him from the inside."

"Okay, fine! What do we have to do?"

"We have to get back to the bunker and retrieve the needle I used on Sam."

"Okay, that doesn't sound too bad!"

"Dean, there is a chance that Sam's body will reject the grace. My vessel is still struggling to adjust to the grace I stole. If Sam's body doesn't accept the grace, it will kill him."

Dean thought long before shaking his head and answering.

"It's the only change we got. If I don't do something, he's gonna die anyway. I can't let it happen again."

"Alright. Let's go."

I was listening to my iPod while writing this and Carry on my Wayward Son starts playing and I'm like " . . ." FEELS! Fun fact, right after i wrote the line "he finally succumbed to darkness, i fell asleep and took a two and a half hour nap. Oh, the irony.