While the rarity of the Traveling Chocobo's several variants and exclusive prints significantly helps their desirability, the Traveling Chocobo's real power comes from how incredibly capable the new card is for landfall decks
Newer titles have moved away from the paradigm of the heroes of light collecting the scattered crystals in favor of broader, more convoluted plot-lines, but most games in the series still have a crystalline element somewhere
Additionally, these cards are in chocobo track foil, an all-new card treatment
One of my favorite plays was a game where I was sitting on the chance to play Maui, from the film Moana
Scions & Spellcraft: Outpace your opponents by generating card advantage that helps control the game
This is a vital catch-up mechanism if youre facing Sapphire/Steel decks that tend to ramp and draw aggressively, often leaving you at a card disadvantage by the mid-game