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
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
It is meant to weaken, and the method of operation, battle results, and battles damage given to the opponent are basically the same
Blister Pack (Pokemon Skyridge | Pokemon Cards) prices are based on the historic sales
You may attach only 1 Pokmon Tool to each Pokmon, and it stays attached
So, with two Butterfree on the Bench, that's a whopping 40 HP getting healed each turn for all of your Pokemon