Looking at counter gain, I think this has tons of possibilities, and time will tell when a good player can utilize it effectively post rotation. Here are some ideas:
-Sylveon decks could use it, as it reduces the dependency on DCE to attack, and they play plenty of fairy energy anyways.
-Empoleon is another user, as it cuts its reliance on Counter Energy, which is prone to getting hammered off.
-I could see Gyarados-GX use it to tamper down is heavy attack costs. Considering how frail Magikarp is, it wouldn't be too uncommon to start behind prizes to use it.
-Tech DCE users like Tauros-GX will like this card a lot, as you get to dodge using special energy in decks.
These are just a few ideas on top of my head. But I believe the usablity in this card will give it some play sometime.