Dragonair from SM can definitely help out the dragonite from roaring skies which cost five energy to attack. Maybe you could combine it with a vikavolt engine:
Could work. I like your deck concepts.
Also whats with people pointing out obvious counters? Every setup can be destroyed with the right check so why try to immediately name a counter to discourage this. This player has an idea and wanted to know others thoughts on the matter.
It's pretty clear we all have an understanding of the meta so when ideas come up like this, instead of saying x beats y, or x card does that, why not contribute to the idea? This isn't the yugioh community right?
Honestly, do i think the card will see a lot of play? No.
Do i think a deck can be made with this card? Definitely.
Does a deck like this with the right engine become popular?
Have fun though.