Each Disney Lorcana set so far has played host to at least 12 Secret Rares, so there will always be at least a dozen cards that go beyond the designated number of cards in each set
However, if the opponent challenges one of the player's cards while Musketeer is in play, that challenger must also have the "Bodyguard" trait
That power comes via Madam Mim, Rival of Merlins Gruesome and Grim ability, which allows her to be exerted to play a character with a four-ink cost or less for free
While previous sets added some new cards, like Location cards, Azurite Sea is more about building out the foundation of cards, expanding the roster, and including more of fans' favorite franchises
Fitting with its name and theme of pulling islands from the sea, the card allows a player to search their deck for a location card to add to their hand
Theres nothing like it in Emerald to date (and not really much like it in any ink type right now)