User blog comment:Gcheung28/Supernatural Q&A/@comment-24834479-20150710235736

Here are a bunch of questions that have been building up in my mind for a while.

-How did Castiel survive the fall from Heaven if he was rendered mortal by the removal of his grace?

-How did Crowley teleport into the bunker when Dean became a demon, when the bunker is warded against any evil ever created.

-How did the Steins break into the bunker when it is "impervious to any entree except that key".

-If the mark was created to keep the all powerful Darkness locked away, how was a simple hex bag able to remove it? Did it just remove he physical appearance?

-Why did Sam and Dean get into Heaven in "Dark Side of the Moon" without a reaper?

-Why didn't Cas use a reaper when he was looking for Purgatory in season 6?

-Since we now know that the Mark is a lock/key to the darkness, what is its connection to the first blade?

-Why does Cain's death not have the same effect as Abaddon's?