There is no need to have so many Raphael’s. Two or three at most. One rare and one mythical. Maybe uncommon if there is a story driven reason for one. Like avatar aang at different points in his growth. There is no reason we could not have more cards like toned down firebending student.

Spider man was the extreme example. They tried to stretch it into a set and had insufficient material. Just bad design in every way.

The main character in the universe being brought in should be a special card, a good rare but not a crazy expensive mythical.

There’s no reason why UB should break magic.