Cryptic Command is powerful with faeries because it is a versatile tool that does 2 of something that faeries want to do: 1) Counterspell; 2) Boomerang--yes, that includes returning lands, or Mistbind Clique, or Spellstutter Sprite; 3) drawing a card and gaining card advantage; and 4) tapping opponents' creatures to prevent them from attacking while at the same time making yours 'unblockable.'If I were to add Cryptic Command, I would probably add 2x (just due to the fact that they're $20 each) and replace 1x Disperse and 1x Familiar's Ruse. Counterspell is nice, but for the sake of synergy, I put in a playset of Familiar's Ruse so I can return a Mistbind Clique or Spellstutter Sprite back to my hand. The more you can bounce those creatures back to your hand, the better!
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Disclaimer: not legal in standard or extended, for those of you who care about that sort of thing.