RG will want many copies, though its pretty good in just about any green deck (assuming you have some bite-worthy creatures)
I have cycling cards like Krosan Tusker and Shefet Monitor that can be cycled, get you two cards, and then cast as board threats
Machamp has the following attacks: Power Press - 70 damageIf this Pokmon has at least 2 extra Fighting Energy attached, this attack does 50 more damage
Pokmon TCG Celebrations: Classic Collection - Claydol Claydol may seem like an unassuming Pokmon, but it was actually a very powerful card for its Pok-Power, Cosmic Power. Players could draw up to six cards each turn as long as they placed one or two cards from their hand onto the bottom of their deck
This dynamic is similar to buying a lottery ticket: statistically unfavorable, but with a large enough prize that the rare hits make the practice economically rational in aggregate (for holders of many boxes)
Regardless of what the future holds, Umbreon ex is guaranteed to remain one of the most expensive modern Pokemon cards for years to come