This is a thematic Fearie deck, and it’s probably not very competitive.
I could add specific cards that would make the deck better, but I wanted to stick to the theme, so.
Sylvan Splendor is nice. I have one Town in the deck, so I can cast some Faeries to hopefully trigger the Splendor a few times.
Sling Pixies and Poisonous daggers:
Don’t take damage from enemies with 4 or more power. Let them kill enemies with more than 4 power. Or even better: put them on a mountain pass so they cant be attacked by enemies while they sit up there sniping foes using poisonous daggers.
Also nice with Attack by Night.
Without the daggers they can be nice blockers against 4+ attack enemies.
Fourberrie Knot and the Faerie Queene bestow this ‘cant be damaged by 4 or more power’ on my Faeries, which worked great for me before.
There are a few spells and sites in the Deck which give Stealth to my minions. I like to have a Stealthed Sugarplum Pixies or Tooth Faeries hanging around on an opponents site doing their tap/ untap thing, whilst holding a Devils Egg :)
Fey Changeling is nice to return minions to opponents hand. If you have Hyter Sprites you can then cast those to stall the summoning of returned minion even longer.
Hyter Sprites also work with Lookout.
Evil Twin is in here to copy bigger minions. It isnt a Faerie, but it kinda fits with Selfsame Simulacrum and Love potion.. Since Faeries themselves arent powerfull its cool to just copy or steal your opponents big minions, it fits the theme :)
Mother Nature isn't a Faerie either, but she works well with the Seer’s ability (you can first scry before triggering her ability at the start of the turn).
Green Knight is in here to protect important fragile Faeries like the Faerie Queene.
(I don’t have a copy of Unseelie Court because I always drew it at the wrong moment, and it made me discard too many good cards. Maybe Ill find a way to use it later..)
Shrink and Pollimorph allow you to crush big enemies with your weak Faeries :)