Losing Cas was a lot to handle. For Sam also, but Dean was absolutely devastated. It was all too much. Castiel was dead. Mary was stuck in the apocalypse world with Lucifer. Jack was born.

The boys decided to give the Angel, killed by Lucifer, a proper Hunter's funeral by burning his corpse.

The flames of the fire burning were the only thing warming up the cold night sky.

Sam stepped back, giving his brother some time, knowing that he probably needed it.

Dean didn't utter a word. He just kept staring at the fire, enveloping Cas's body wrapped by the white sheets.