This was just wow. I loved it just as much as its prequel.
This was also written extremely well and it also flowed.
I'm so glad that Dean was saved by Sam. You had me all worried and apprehensive there during that tense scene in Bobby's basement until Sam showed up. I was even more happy when I realised that nothing really happened to either Dean or Sam when they looked into the mirror.
The last line when Bobby called them idjits before he went inside, I could totally picture it in my head.
So thank you for another incredible story.