User blog comment:EmpyreanSmoke/Supernatural Q&A/@comment-27006668-20151026220942

1. Remember When Sam asked Death to make his death permanent. As in there's no coming back and Death agreed. If Sam did indeed go with him, would Death have taken him to The Empty?

2. Was Jesse immortal (at the height of his powers)? I thought he was mortal as a human, but when Cass went to kill him, he used Ruby's knife. Why not any regular knife? Why not smite him? Which brings me to my next question...

3. Could regular Angels, Seraphim, and Archangles smite/kill Jesse?