From game-breaking cards and combos, to fun restrictions that completely destroy enjoyment, to offensive artwork, there are plenty of valid reasons a TCG creator might ban a card or even a group of cards
To do that, we developed a workflow that asked concept artists and card artists to pull hallmark character designs from Yoshitaka Amanos original (and legendary) concept art, the original FFVI sprites, and the FFVI Pixel Remaster character portraits, to synthesize the most consistent elements of each characters design into something new. We also encouraged our artists to punch up finer details and explore elements where they thought they could push (fabric, patterns, textures, etc.) Then, we would meet with the Final Fantasy VI review team, and they would give us feedback on what core elements they wanted to preserve and what new elements they were excited about
Again, when building a deck for Lorcana, you must only include up to two of the ink colours
Then if they kill it, your opponent has to attack you and take damage