This is a deck I bought a long time ago before really knowing a whole lot about magic. (Surprise, I still don't!)
I still love the idea of playing faeries, and would love to upgrade from here. Some of the next steps I have in mind:
-Replace the Zephyr Sprites, they don't do anything for the gameplan. Having a one-drop is nice, but they are way too weak. Enabling cards like Mistbind Clique is best left to manlands / possible Bitterblossoms in the future.
-Military Intelligence is an interesting card, but I find myself outclassed and having to chump block to survive way too often. Taking this is a much more controlly direction seems to be the best idea, in which case these will definitely be cut.
-The Vapor Snags will be replaced by the likes of Fatal Push once we branch into more colors. Black seems to be the most solid choice as of yet.
-Ninja of the Deep Hours is a strong tempo play, especially considering the faerie we pickup likely has a decent ETB effect. Will be dropped eventually when the deck moves to be more controlling.
-Thassa, God of the Sea really serves no purpose. Easy cut.
-Scion of Oona is nice in some matchups, however I think 4x is too many. Probably cut to a 2x.
-Spell Pierce / Glen Elendra Archmage are both strong, but will move to the SB. Dead cards in some matchups, so likely unplayable in the main.