▣ How to unlock locked cards?
In order to open the locked card, you must get the key card first
▣ Twin card :
The Twin card counts as two cards so you must be clear it twice
▣ Muddy Card :
The muddy cards can only be eliminated with card combos!
If you can remove 3 to 5 cards in a row, the mud on the card will start to decrease. If the combo is broken before the Muddy Card is removed, all the mud will return.