Theyre intended to be used as handouts for Trick or Treaters on October 31st
Draw a Card, Play available Pokmon and evolutions, Play your Trainer cards, Attach an Energy Card from your hand to a Pokmon, Attack (If able)
It contains 16 holographic - or shiny - cards including Charizard, Mewtwo, Blastoise and Venusaur
The set's identity as "the Eeveelution set" gives it the same structural advantage that Evolving Skies had the kind of clear, compelling theme that drives sealed product appreciation after print runs end
detach all materials from it, and if you do, return it to the Extra Deck, then, if there is a Monster Card in the GY among those detached materials, Special Summon as many of those monsters as possible from the GY to your opponent's field in face-up Defense Position
Alternatively, if Mew ex has suffered a lot of damage, you can return it to your hand with Budding Expeditioner and then play it again fully healed