In the Monster Card UI you added some filters in the past, and readjusted/fixed some issues, this seems to work great now, thank you.
In addition to this, I am wondering, if there is a filter option to just show green cards or only blue cards ?
I can select "Boss cards" which is mostly purple, and world boss, which is mostly orange, but i have not seen an option for green cards and blue cards.
Another suggestion.
When selecting a specifi zone, or "area" of cards, like dungeon, city, region, battlefield etc, this is implemented as an open selection to the right, and the second choice, within this area also.
My suggestion is, make an overview page with HUGE nuttons, for region, city dungen etc, so people can just one.click on that area/button, then open a new page with huge buttons for the specific zone, dungeon etc.