As you play a card that has an Adventure, such as Jidoor, Aristocratic Capital, you have a choice
Cards from the set also won't be legal for competitive play until their official release date, but you may still want to test a few new builds with them before your first competitive event
Additionally, 4 copies of a double-sided punch-out counter card take the place of 4 double-sided tokens in the Counter Blitz Commander deck
It doesn't copy whether that creature is tapped or untapped, whether it has any counters on it or any Auras or Equipment attached to it, or any non-copy effects that have changed its types, color, power and toughness, and so on
Ultimately, this should be the only time that Ravensburger needs to release such a reprint-heavy set, as it's effectively a way to draw in any players who passed on Lorcana initially, but then left it too late to buy in due to the speed with which new sets were released
Lilo: Making A Wish offers the same setup as an Amber card, so either can be used to flesh out a powerful Amber/Amethyst deck