There are specific Pokmon sets where, if you line up all the cards side by side, they actually make up one full artwork
So, with two Butterfree on the Bench, that's a whopping 40 HP getting healed each turn for all of your Pokemon
There are two main Lost Box variants: SableZard which, as Alex Schemanske (who made top 8 with it in Charlotte) puts it, beats the whole meta apart from Gardevoir and Rapid Strike
Orcish Siegemaster makes your orc army a massive threat by giving it trample, and in return it also gains a power bonus whenever it attacks
The set also split up Pokemon Power abilities into Poke-Power and Poke-Body, depending on the effect
Depicting the Mega Evolution mechanic that had just been introduced in the Pokmon X and Y video games, these cards were even more powerful than ordinary Pokmon-EX