The first wave of promo cards can be identified by their set number P1 and a unique logo in place of their rarity icon, indicating which event the promo card was available at
While any crossover has the potential to be a lazy cash-in, especially with Magic: The Gathering (cough, Monster Hunter delay, cough), the Final Fantasy set was incredible
However, up until very recently, we've been pretty much in the dark about the set, save for a few pretty pieces of key art
The difference is that while they have an ink cost on them, there is also an extra block of text in the description area of the card which details that you can exert a character (turning them sideways and opening them to attack) of a minimum cost in order to play the song card for free
Each player needs a 60-card deck of Disney Lorcana TCG cards to play