Action cards are played as a one-time use effect and often are more powerful than Items, but also often cost quite a bit more ink
For a reasonable 3 mana cost, players can activate their Traveling Chocobo and use it to play any lands or other Chocobo/bird cards in their deck, provided they're in the top spot, potentially gaining a significant upper hand in either standard or commander game types
Lets get dangerous
Amethyst players have had the ability to manipulate the top card of their deck since The First Chapter - for example, with Yzma, Alchemist the player is able to look at and put the top card of their deck onto the bottom after questing if youre not a fan of what youre set to be drawing next
One exception to note is Uncommon cards, which are represented by the rarity symbol of an open book - the logic being that an open book has two sides, or pages
To learn more about their seafaring adventures, read up on Azurite Sea at DisneyLorcana.com