The card Exchange quest is available!
The exchange quest unlocks at Stage 4.

In these quests, you can trade in certain Common, Rare or Epic cards to exchange for higher-quality cards (including Legendary cards).

The exchange quest will refresh once per day.
By completing the exchange quest, you will receive Perk Points and Quest Points.


New Perk: Chest Cards Boost

Notice that to unlock this new perk, you still need to get the Challenge Pass first.

When you activate this perk, any other chest except for Fortune Chests contains extra club cards at a certain rate. 

a. The perk level

This perk can be further upgraded by accumulating Perk Points. The perk level is permanent and will not be reset with the new Challenge Seasons. The higher your perk level is, the more extra cards you will get from chests (except for the Fortune Chest).

b. Required cards

The higher your perk level, the higher the level of clubs you will need to complete the exchange quest.

To complete the card exchange quest, you need to use certain club cards (in the required quantities and with the required level). For instance, if your perk is at level 2, then to complete the quest you need common cards at level 5 or rare cards at level 3 or epic cards at level 1. Please note that the type of cards needed will be random in the daily quest.

c. Extra cards rate

Each time you reach the next perk level, you increase the rate of extra cards granted by the perk.

Suppose that now the perk is at level 9. If you would get 54 purple club cards from legendary chest of stage 15, with the Chest Cards Boost at 40% you can get 54 x 0.4=21.6. The actual number of cards you get will be 54+21=75 in total. However, with perk level at level 2, the buff will be 5%. Then if you would get 23 common cards from a platinum chest, the actual extra cards would be 23*0.05=1.15. Then according to the rounded down rules, the final cards you will get will be 23+1=24. 

Try completing more Card Exchange Quests to gain more perk points