The Pokmon competitive system uses what is called the Best Finish Limit (BFL)
Even if you are not shopping at that level, there is value in seeing those cards in person, comparing condition, and getting a better feel for the market
Ill get to the main list momentarily, but first Dishonourable Mentions Skyclave Apparition I know Skyclave Apparition is a good card and I accept that its probably better for the game that it exists
It's not immensely, but it's advantageous to hide cards like this in your manabase without sacrificing the consistency of your land drops
Enchanted Lorcana cards are also finished with a rainbow-like holographic effect that the game calls an inkwash foil
The last Doctor card in the Blast from the Past set is The Eighth Doctor, a card that forces the player to mill three cards when it enters the battlefield, and then allows them to play a historic land or cast a historic permanent spell from their graveyard - whenever they use this ability, the chosen card is exiled when it leaves the battlefield