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
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")
You want to be at 0 Life cards and have two Kids in the trash for Gecko Moria to find value
Grafdiggers Cage The groans of the graveyard player when you cast this are usually preferable to those of their freshly raised undead legions