It’s not a card, it’s a tacit understanding drink. The 5-star purple ones are probably taken by 5-star heroes for expeditions, which are located in the jungle module. Sometimes there is a (crispy) dungeon in the dungeon event. It seems to be - - If you fight there, you can get a tacit understanding drink. Sometimes it's still 6-star orange. If you don't know, you can ask me.