Enchantment-focused decks are much rarer than creature-focused decks, but they do exist and they can be quite powerful if built properly
If your Eye of Nidhogg-enchanted creature is killed in combat (or its hit with some targeted removal), you can thankfully return the aura from the graveyard and back into your hand
You don't need other Faeries
Every spell you cast this way will replace itself (and hurt you slightly), which means you'll basically never run out of cards if you can keep the Treasure generation coming
Green is a great color identity, so players don't have to be too picky when deciding on a background for him, and the deck's included background, Passionate Archaeologist, is probably the best choice
But keep in mind that this can easily become the best cantrip when you do have a shuffle effect handy