Card packs are reward bundles that contain multiple Collection cards. You earn them by playing events and completing quests.

🃏 Each pack has its own color tied to how many cards it gives:

• Brown pack: 2 cards
• Green pack: 3 cards
• Blue pack: 4 cards
• Purple pack: 6 cards with a higher chance of rarer cards
• Red pack: 6 cards, with at least 1 new card

You can read more on how cards are distributed in packs here