When it was first released, the Pokmon GO mobile game took the world by storm and helped bring millions into the Pokmon fandom
Now, Energy Exchanger is still in the format, but generally isnt used because the decks that need a ton of energy, Reshiram variants and MagneBoar run a very effective drawing Pokmon, coupled with a fair amount of either hand refresh cards or digging cards
Inquisitor Greyfax buffs all your other creatures as well as giving vigilance
You can see an overview here: 90% (4th card), 60% (5th card) 5% (4th card), 20% (5th card) 1.666% (4th card), 6.664% (5th card) 2.572% (4th card), 10.288% (5th card) 0.5% (4th card), 2% (5th card) 0.222% (4th card), 0.888% (5th card) 0.04% (4th card), 0.16% (5th card) So, if you open 1,000 boosters, there should be one to two cards of the crown rarity
While Galarian Moltres V doesnt see a lot of play competitively anymore, this card comes from a time when it was in almost every deck thanks to its handy ability and powerful attack