User blog:Fusedtwilight/Could Castiel become an archangel?

So we found out it took God and the four archangels to defeat the Darkness. But Michael and Lucifer are in the cage, Raphiel was killed by Cass and we are not sure if Gabriel is really dead.

Castiel is based on the archangel Cassiel in post-biblical Judeo-Christan religion. There are spells written that invoke his name for a number of purposes and his name would be written on ammulets for protection.

I figure if God was able to upgrade him once why not do it again? Unless he decided to bring back Raphiel so all four archangels can once again help fight the Darkness.

What do you guys think?