Im positive youve heard of these little fiends before, I mean, who hasnt
This is a decent draw spell that gets a lot better thanks to Harmonize -- if this format is slow it might be insane, but if it's a typical format it's probably just solid because it never adds to the board
Counter Energy is very common in Mew FCO 29 decks which its ability of copying basic Pokmon's attacks, one of them being a "Single Prize" card, it could copy GX or EX Pokmon, and the most common are Garchomp & Giratina-GX UNM 146, Togepi & Cleffa & Igglybuff-GX CEC 143, Marshadow-GX BUS 80 and Amazing Rare cards, specially those who demand a lot of energy, being the most common one the Kyogre SHF 21
8, 2013 Fire King Avatar Barong is one of the earliest three-ofs in the archetype, and it is easy to see why
This effect allows you to shut down a lot of decks that rely on the graveyard, including Invoked Shaddoll Dogmatika, Edlich, and so on