Not sure if this is the right place,but i found out something funny.In episode 3x06 the one were Bella almost gets killed by the ghost ship,when Sam is reading the incantation he says the word Castiel :D
Moving this to the season 3 thread.
:) Yup. Well there are angelical invocations for spell work that often have the names of specific Angels in the actual Angelic hierarchy.
Lol. I'll have to rewatch that episode just to hear Sam say "Castiel".