From my own experience, as I used a lot of fire decks, this energy was a big help because of its effect: any attack that paid a tribute of energy discard as its discard gets its energy turned back into the Pokmon
That broad appeal keeps prices comfortably in the mid-range
Astrologian's Planisphere Bard's Bow Black Mage's Rod Coral Sword Crystal Fragments Dark Knight's Greatsword Dragoon's Lance Lion Heart Machinist's Arsenal Magitek Scythe Monk's Fist Paladin's Arms Red Mage's Rapier Sage's Nouliths Samurai's Katana Thief's Knife Warrior's Sword White Mage's Staff
Has the potential to go very far
Thats because in addition to the classic media value of such a campaign coverage, comments on social media, exchanges within the community theres also the value on the secondary market, which is probably very high in this case, and the much greater attention it will attract
And this is from an exhaustive list of Twin answers that see heavy play in the Modern format