Each card has some associated tags listed under its artwork, which may tie into specific gameplay effects, as well as Lorcanas shared setting or deck construction restrictions
When Mulan leads the charge and challenges a character, every one else is able to go after readied ones instead
This means that they cant be chosen for any card effects, and your opponent can only Challenge them
Finally, one card in each pack will always be a foil card and can be from any rarity and can even be Enchanted if a person is very lucky
I've been playing and reporting on the best card games for a long time now, and Disney Lorcana is near the top of my favorites list (it's beaten only by Magic: The Gathering in my eyes)
Excalibur II needs to pick up at least three charge counters before its worth equipping, and thats just not going to happen often enough to justify running it