In a singleton format you have to run a set of cards that all fulfill the same basic function, so instead of running 4 copies of Harmonize, you might run Harmonize, Greater Good, Beast Whisperer, Return of the Wildspeaker, Garruk, Primal Hunter, Shamanic Revelation, Soul's Majesty and Rishkar's Expertise
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In other words, it will take 2 turns to use the attack unless you come up with some ingenuity
So knowing all of this and reading the overview of this Florges card above, I would recommend using this card in a spread damage type deck, thus using it with the first Flabebe card in this set and the second Floette card in this set because Floette also has the Petal Blizzard move
Any one of those earns you a card
One notable thing about this card is that it has a flavorful sequel in Etched Familiar