Captivating Crew and Mass Mutiny play on borrowing your opponents' creatures, which decreases their available blockers and gives you most of the benefits those creatures bring with them
You see, whenever you cast an instant or a sorcery spell, you can have the Dragon deal two damage to any target at all
While it's far from the most playable card, it's not a bad land necessarily
Protect the value of cards for trading and collections
These cards are both collectible and playable, and since character Cast Members all learn the signatures of the character they play, there should be a uniformity here for collectors, no matter which park's characters might be signing
If you're only interested in cards rather than the TCG accessories, then this is a great, fairly cheap option to get some packs and even an exclusive promo to keep in your collection