Can you recommend some good Supernatural Castiel fanfiction?

Well, 'The Angel and the Hunter' is a popular Castiel Supernatural fanfiction. It delves deep into the relationship between Castiel and Dean. It shows how their bond develops over different situations and challenges they face. Also, 'Castiel's New Powers' is quite exciting as it explores Castiel getting some new and unexpected powers and how he copes with them.

Well, 'Castiel and the Elements of Harmony' is also worth checking out. In this fanfiction, Castiel gets involved with the powerful Elements of Harmony in the MLP universe. His angelic powers and knowledge play a big role as he teams up with the ponies to face a common threat. It's a great read for fans of both Supernatural and MLP as it blends the two universes so well.

I really liked 'In the Shadows with Meg and Castiel'. It's a more introspective piece that explores their individual struggles and how they come to rely on each other. The descriptions in the fanfiction are really vivid, making you feel like you're right there in the Supernatural universe with them.

One popular piece of fanfiction might be 'Castiel in Equestria' which combines the two universes in an interesting way. It has Castiel interacting with the ponies from MLP in a world filled with both magic and the unknown, much like his experiences in Supernatural.

There's also 'Castiel's Redemption'. This fanfic focuses on Castiel's journey of self - discovery. It shows his interactions with the other characters from Supernatural and Ghostfacers in a very engaging manner. It's full of emotional moments and great character development.

One great 'castiel x dean supernatural fanfiction' is 'AUs Are Made of This'. It has a really interesting alternate universe concept where their relationship develops in a unique setting. Another is 'Heaven Can't Wait' which delves deep into their emotional connection.

One great 'Supernatural Castiel sad fanfiction' is 'Fallen'. It delves deep into Castiel's internal struggles after a major fall from grace. Another is 'Alone', which shows Castiel feeling isolated and sad due to his unique position among the angels and his relationship with the Winchesters. There's also 'Lost Hope' that focuses on a time when Castiel loses his faith in the mission he once held so dear.

One great 'Supernatural Castiel Abandoned' fanfiction is 'Abandoned by Heaven' on Fanfiction.net. It delves deep into Castiel's feelings of isolation after being seemingly abandoned by the angels. The story is well - written, with great character development.

Another good one is 'When Panic Strikes Castiel'. In this fanfiction, the author does an excellent job of portraying Castiel's internal turmoil during a panic attack. It's a short but intense read that really gets into the emotions of the character, and it has some unique interpretations of Castiel's relationship with the other characters in the Supernatural universe.

Some fanfictions in this category might involve Castiel dealing with the physical changes in a unique way, given his angelic nature. He could be both confused and curious about what is happening to his vessel. These stories often play with the idea of how the Supernatural world's rules interact with this very human - like situation of pregnancy.