While the second and third abilities of Champions from Beyond have "Party" in their flavor words, neither of them refer to a player's party (a mechanic from previous releases that also uses the term "full party")
So if we just take a look at Revival Trance, for instance, this deck has 19 brand new legends all by itself
Given the collectible factor, they tend to be considerably more expensive than traditional versions of the same cards
Understandably, players cannot have more than two of the Glass Slipper Item card in their deck, although most would avoid bringing an Enchanted card to the table regardless
If you play Lorcana competitively, Legendary cards represent some of the most powerful cards in the game: Rapunzels: - Gifted with Healing and Elsa - Spirit of Winter
It also puts him just out of reach of most cheap removal