In South Park: Phone Destroyer there are over 80 different cards which you can collect for your deck and you will need to get as many of them as you can to improve your chances in battles. Listed below are several ways which you can get new cards.
PvP Packs are special card packs which you are rewarded with for every 3 wins you pull off in PvP mode. There is a cooldown period where you will have to wait 3 hours after you open a PvP pack before you can open another of these packs. This is the best way to earn new cards, especially if you are a player that likes to compete against others around the world.
In South Park: Phone Destroyer a free card pack will bedcome available every 4 hours which means you can recieve up to 6 of them during a 24 hour period. The downside to this method however is the game only allows up to two card packs to be stashed which means you will need to return every 4 hours to unlock the card packs that you have available so you are able to get more. As this method is totally free it makes it a great way to farm for cards without having to grind for them.
It is recommended that you join an as soon as you unlock the ability to do so as this will give you the opportunity to meet other players and also allow you to request cards from your fellow Alliance members. It also enables you to donate your unwanted cards to help out your teammates.
Although it is not necessary there is always the option of using real money at the in-app store to immediately stock up on cards which you can then add to your deck, give away, or just ignore.