To unleash the potential of a Charizard ex deck, you should run it alongside Moltres ex
They add about $30 per pack in average
You can see all of the Pokmon Sets and their symbols here: Pokmon Sets For the older cards, the set symbol is on the right half of the card, just below the Pokmon picture
Now you want to use cards like Urza's Bauble to adjust ratios and have as filler cards but back in the day you could afford these slower but more luxurious offerings
An added bonus is that you don't need multiple copies of Black Dragon Ninja if you don't have them, since you can consistently summon him from anywhere
(And if youre an idiot like me, who doesnt read the piece of paper with READ THIS FIRST before thinking you know better and shuffling the cards, theyre also numbered so you can put them back in the correct order.) Once youve played that through once, you can go ahead and shuffle as much as you want, and then play the game proper