Dean tended to Castiel best he could, but he wasn't a genius like Sammy, and didn't know a think about angel anatomy. He tried everything he could think of. He cooled Cas's head with wet cloth, iced the spots that looked bruised while he set to work on the cuts and stabs with his sewing needle and a batch of dental floss. It was a patch up job like a hunter knew how, but would it be enough?
After hours, Cas still hadn't stirred. Dean was growing restless, pacing the floor and even biting at his nails a few times. After what seemed like days, Cas finally turned, grunting in pain. "Dean." he groaned.
Dan was by his side in a panicked instant, "You're awake!"
"I'm-" Cas coughed, "I'm fine."
"You're not fine in the least." Dean growled, keeping Cas in the bed. "You took a good beating, but Gabriel brought you here-"
"Gabriel!" he coughed again, "He's the one who," another cough. "He did this."
"What?!" Dean glared, "He took Sam. I thought he could help wake him up so..."
"It's not Gabriel in there anymore." Castiel replied, his voice hoarse.
"What are you talking about?"
"His grace is gone, he's- he's basically a demonic form of angel."
"Like what, angel from hell?"
Castiel nodded. "Oh god," Dean groaned, "How do I get Sam back?"
"Sam may be fine, Gabriel has a specific fondness for him, but-" he coughed once more, a violent and slightly bloodied one.
Dean stirred nervously, "Are you okay Cas?"
"I already told you I was fine." he replied sharply. "I need to get to them."
Cas started to get up, but Dean pinned him to the bed again, reminding him he needed rest, even an angel needed rest to heal a wound like that. Dean cringed, wondering how to tell Cas that he was missing a wing. The thought alone made Dean depressed. A wingless angel. Sounded like a punishment saved for the most traitorous of angels. Cas was innocent, and he'd been tortured on the Winchester's account one more. Tortured again on his behalf.
He was feeling the urge to gank Gabriel again, his rage boiling over and apparently spilling out. Cas grabbed his hand, "Dean." he soothed, "I'm fine." Dean tried to smile for Cas, to keep his spirits up, but he stayed angry inside. Hateful and raging, ready to kill. Ready to Murder.