Treasures are useful because they can accelerate your mana in a pinch, or you can use Magdas payoff effect to find expensive artifacts or Dragons to close the game with, opening up a cool token play pattern that is a breath of fresh air after years of Krenko and Purphoros, God of the Forge combo killing tables by generating a zillion goblins
These correspond to a full art Pokemon, a full art Pokemon ex or Supporter card, a full art "immersive" Pokemon ex, and a gold full art card (called a "crown rare")
Grafdiggers Cage The groans of the graveyard player when you cast this are usually preferable to those of their freshly raised undead legions
In short, the flavor text is just a clue to help you figure out the card
Oh, and it also brings back Trainer Pokmon cards, revived last year during the swansong of Scarlet & Violet and then weirdly abandoned just as it was getting going
Lightning Bolt The burn player in me is screaming that not putting Lightning Bolt at #1 is heresy but, well, the times, cards, and formats (and life totals!), they are a-changin'
