I keep reading all these …. "shield" stories, so here's my take.
Side Note: I have no idea what E/O means, or where this challenge was posted, so if this doesnt actually fit the guidelines of said challenge, sad day.
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It was supposed to be an easy fight. Four demons were terrorizing a town, and the Winchesters had followed them to an abandoned warehouse. They had no idea what the demons were doing in there, but they seemed to be completely focused on it. The brothers were sure the demons were unaware of their presence, and so they set the ambush. They placed devil traps in front of every door, and salt lined every window; there was no way these demons were going anywhere.
They headed back to the Impala. Dean tossed Sam a shot gun loaded with salt before grabbing one for himself. Sam tucked Ruby's knife into his pants. A ring halted there movements. Dean answered his phone.
"Hey Cas…no we're…no rea…" he sighed, and rattled off their address. A second later Castiel stood between them.
"We need to go, you are needed a-" Dean shook his head, "No Cas, we're in the middle of something."
Cas cocked his head, "What is more important than stopping the apocalypse?"
"Well…uh…"
Sam grabbed Castiel's shoulder, turning the angel to face him. "We're in the middle of a hunt right now, we'll help you in a minute." Sam looked thoughtful, "You know, it might go faster if you help."
Castiel inclined his head, "Then I will help."
Dean locked up the Impala and explained the situation to Cas as they headed back to the warehouse. They paused to look inside a dirty window, and once they were sure they had the element of surprise they rushed in.
The demons put up a good fight, but were no match against two hunters and an angel.
Castiel banished on instantly, and was momentarily taken over by a second.
Dean was tangling with a girl who fought like a spider monkey and kept slipping out of his grasp. She knocked him to the ground and proceeded to kick him in the ribs repeatedly. Suddenly she was knocked backwards, Castiel ripping the demon from her body, allowing the vessel to fall limp to the ground.
Dean bent over, trying to regain his breath, and managed to choke out "Thanks Cas." Still clutching his chest Dean looked over at Sam, and screamed, "NO!"
Sam had been backed into a corner, Ruby's knife knocked away; he was still blocking blows…sort of, but it was clear the demon was wearing him down. The demon knocked Sam to the ground and looked around. He found a crowbar, and grinned as Sam regained his footing. The demon pulled back and stabbed downward.
Sam turned, wincing in anticipation of the blow, but it never came. Cautiously, he looked back. The tip of the crowbar had stopped two inches before him, and dripped with blood. He followed the bloody iron up, until it intersected with a trench coat that was rapidly darkening.
"Cas," he breathed.
The angel gripped the bar tightly to prevent it from sinking any further back, and blood trickled down his chin. He reached out a hand towards the fallen blade, and with a thought it obediently flew to him.
In a quick movement Castiel slit the demons throat.
Once the threat had been dispatched, Cas staggered, and Sam helped him to the ground.
Dean ran to them, quickly checking Sam over for wounds before kneeling before his angel.
"Cas…"
Castiel raised his blood soaked hands, and gripped the crowbar tightly. He grunted as he removed the bar from his chest, and once freed of it, tossed it to the side.
Dean hurriedly opened Castiel's shirt, and sighed a breath of relief as the skin mended itself.
Sam hugged the angel tightly to him as Dean rested a hand on his cheek. Together they breathed a sigh of relief and said, "Thanks Cas."