Master Ball Foils saw incredible rises and falls in Scarlet & Violet: 151, and this Leafeon, along with its kin, are likely to see the same, especially given that Prismatic Evolutions offers them in English
Do note that you will want to have both Lightning Energy and Water Energy selected for this deck, as Dragonite requires one of each for Draco Meteor, which deals 50 damage randomly across your opponents entire board
Keep in mind that adding cards in every pocket (front and back) effectively doubles the count, though its wise to ensure cards dont press against each other too tightly
Players that earn 10 or more points during the series earn a foil Chocobo art print
If it dies or changes control after that point, this ability will still trigger at the beginning of your end step as long as you control a commander creature with the ability