When it enters, you have the option to bounce any permanent
Raikou ex is classified as a 2-Star Shiny card in the Paldean Wonders set
Not every holographic card was made equal, with some Gyarados and Hitmonchan appearing in theme decks, this meant you could open two boxes to yourself and still not pull a Charizard and the main point is back in the day the demand far outweighed the supply, so who could get their hands on multiple boxes let alone multiple packs
The last edition released on October 8 of this year
Unknown to either Jace or Bolas, this attempt triggered a failsafe placed in Jace's mind by Ugin, to protect the secret of the latter's survival from Bolas, by temporarily wiping the mind mage's memory and forcing him to planeswalk to Ixalan, thus saving Jace's life (as well as Ugin's secrets)
Part of card selection here is that were incentivised to not use permanents, because they can be swapped away with the ultimate