When it comes to sideboarding, I think the most obvious cards you can cut are as follows: 1-2 Exhume or Animate Dead Going down to ten reanimation spells is okay, and which you cut depends on the matchup
It also helps that this is an incredibly silly effect - the sort of thing we'd expect to see in an unset than on a regular Magic card - and tied to a very popular Marvel character
Its manga-style illustration sets it apart from regular prints, making it highly collectible
Maleficent: Biding Her Time is another 1 cost card that can generate 2 lore, making it possible to have 8 cards of that caliber when including Lilo: Making A Wish
Stealing your opponents best creature is two-for-one of the best kind, dramatically shifting the balance of power on board
As with any other gacha game, remember that your success will depend on which cards you are able to pull, especially considering that the games most powerful ones are EX cards, which are the rarest