Its unfortunate for games
This happens in the first game as well, but it's done in a much more spectacular way in Final Fantasy III
As the term suggests, the rarities each signify different percentages for how easy or difficult it will be to find one of these types in the booster packs of cards for the game
To summarize what we know from what has been confirmed: It looks like it was Ursula who burst out of the locked Lorebook Martin opened This caused the flood, which flushed out the Lore items into the realm of Lorcana The flood of ink has changed the world, creating or changing the Inklands Purple seaweed, pools of black ink, and shadowy tendrils are shown across cards and art Ursula has a secret contract, was looking for lore, and is now finally enacting a plan There is a shadow storm and a mysterious structure at the edge of Lorcana Now, more has been revealed through a trailer, card art, and a new box set
The removal spells in Final Fantasy are just a little weaker and more expensive than were used to, or depend on synergies which make them unreliable
Stitch, Rock Star has a resource cost of 6, attack power of 3 and a defense rating of 5