about the mark, I didnt understand why didint they just try the deageing spell? I mean that worked last time so?? (before they knew about the darkness stuff that wouldve been an ultimate option, I feel like the mark has no real canon lore it is everything and nothing and whatever the show wanted it tok be for 1x5 seasons?)
Because the deageing spell was a MotW thing and those aren’t used in the seasonal mytharc. There are lots of great, useful bits and bobs from MotW episodes that never get used again – time travel, talking to animals, walking in other people’s dreams, Cas’ ability to go into people’s minds... Those things serve their purpose in the episode they’re in, but often they’re not allowed into the general world of Supernatural because if the heroes have access to a too big arsenal of weapons and methods, it’s hard to make it exciting.
But yeah, it doesn’t make much sense within the universe of the show. If I had written that episode, I would have included some detail that made the deageing spell unusable for Mark removing purposes.
I dunno, I feel like the lore for the Mark is pretty solid? We know God gave it to Lucifer as a lock to hold back Teh Darkness, but it corrupted Lucifer and turned him evil, then he transferred it to Cain, who subsequently transferred it to Dean. We know that the First Blade in conjunction with the Mark can kill anything, we know that the Mark demands blood and makes the bearer violent (which makes a lot of sense now that we know the bearer is holding back Teh Darkness day and night), and we know that the bearer of the Mark is very hard to kill and can come back from death as a demon. We know the Mark can be removed by a spell which was written down by Sister Agnes after she had “visions of darkness”, and finally we know that Teh Darkness breaks through if the Mark is completely removed from all bearers on Earth.