Basically, the main version of this card has a cosmos & star holo pattern on the art, with an all-over glitter layer on the rest of the card.
Here’s a cool photo of a cut off glitter layer so you can see it better illustrated:
I recently made an IG post about it but honestly I’m unsure how many variants there actually are. It seems there may be 3:
Most of the info I know about it comes from various sources online, but @quuador @layalouhamesh and @serpintaxt posted some good info in this thread