Several factors influence Dragon card values: card condition (mint cards worth 3-5x more), rarity (holographic and rare cards command higher prices), first edition status, PSA/BGS grading scores, and market demand for specific Pokemon
When thats the case, the top of your library becomes an extension of your hand and a source of major card advantage
There seems to be no way to get these codes right now
Go with the flow and discover powerful new strategies in Pokemon TCG: Sword & Shield: Fusion Strike
Knowing what those cards are becomes part of the information you have access to, just like you can look at the cards in your hand
One pack of eight cards costs 100 gems in the in-game shop, so at this point I am swimming in various types of blue-eyed dragons