• You can collect cards by opening card packs or receiving them from friends or team members.
• Collected cards appear in a corresponding set on the Collection screen.
• All cards have a number of stars, which indicates the rarity of that card.
• You can track the progression of your cards and sets on the Collection screen.
• There are three kinds of cards: silver, gold, and diamond.

Silver Card
 

• You can send or receive silver cards from your friends or team members.
• You can collect silver cards from card packs.

Gold Card
 

• You can't send or receive gold cards from your friends or team members.
• You can collect gold cards only from card packs.

Diamond Card
 

• Diamond cards appear in the diamond and ultimate versions of Collection.
• Diamond cards are one-of-a-kind, and they do not have any duplicates.
• You can't send or receive diamond cards from your friends or team members.
• You can collect diamond cards only from card packs.