The Pokemon 151 set, for example, contains Reverse Holos with a unique Poke Ball pattern highly prized by collectors
To make things more complicated, not all changes are permanent additions to the games ever-changing Standard format Magic tournaments usually uses only the last two years worth of cards which means that people that saw a game once, may experience another very different set of cards and frames when they come across it again some years afterwards
After selecting their Active and Benched Pokmon, players take the top six cards from their remaining deck and place them face-down to the side as their Prize Cards. These cards are crucial for victory: each time a player knocks out an opponents Pokmon, they claim one of their Prize Cards
And, because the vast majority of people don't receive them, they can cost a pretty penny on the secondary market
This ex card has 150 hp which is very good considering you don't want this card to get knocked out since your opponent will be able to take two prize cards for it
Mewtwo EX [1st Edition] #95 (Pokemon Japanese 20th Anniversary | Pokemon Cards) prices are based on the historic sales