Where to get Card Packs?
Card Packs can be found in:
Events (Cave Chase, Weekly Leagues, Wheel of Wonders, Daily Login Calendar, Fortune Quest, Circus spin, Cannon Carnival, and Square Rush)
Saga Levels
Normal levels have a 50% chance of granting a Green Pack
Hard levels grant a Green Pack
Ultra Hard levels grant a Blue Pack
Card boxes in the Duplicate Shop (found inside the Collections tab)
Card Pack Probabilities
Pack Type:
Receive 6 cards from this Pack.
One card is guaranteed to be New. For the remaining 5 cards, the probability of receiving each Card Type is shown below.
Pack Type 
Receive 6 Cards from this Pack.
One Card is guaranteed to be a Gold Card. For the remaining 5 Cards, the probability of receiving each Card Type is shown below.
Pack Type:
Receive 6 cards from this Pack.
The probability of receiving each Card Type is shown below.
Pack Type:
Receive 4 cards from this Pack.
The probability of receiving each Card Type is shown below.
Pack Type:
Receive 3 cards from this Pack.
The probability of receiving each Card Type is shown below.
Pack Type:
Receive 2 cards from this Pack.
The probability of receiving each Card Type is shown below.
* The probabilities stated above are the initial ones. Since a Card Pack cannot grant the same card twice, probabilities will change as the previously granted cards are removed from the pool.