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Castiel yawned deeply, a pale hand rubbing over his eyes. He looked weary. Once finished, his hand traveled down into the pocket of his forest green jacket, plucking out his orange bottle of pills. He shook two of the brightly coloured pills into his hand before he popped them into his mouth. The former angel did this almost without thinking now. 

Castiel shoved his the bottle back into his pocket, head raising again. That is when he caught sight of Sam. Fear struck him like a steel train. He had only remembered seeing Lucifer walking around in Sam’s skin. He could only believe this was Lucifer now. The ex-angel stumbled backwards, jaw clenched teeth and blue eyes wide in terror.