You may choose new targets for the copies you control
In terms of gameplay, Odyssey was the first set that explicitly featured mechanics that revolved around manipulating your own graveyard, and it introduced the popular flashback mechanic (which allows you to play spells from your graveyard) as well as Threshold, which has been featured sparingly in following sets including in 2024s Bloomburrow
At the beginning of each players draw step, that player draws an additional card, then discards a card
Bloomburrow is different, however
The reason that it looks opaque is that it is changing the reflective properties of the surface of the foil underneath
That last bit means that it's basically not worth including in formats that aren't Commander, so it feels odd to see it shoehorned into the set instead of kept to the side in the Commander decks