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Although you can only have 30 cards in a deck in Hearthstone, sometimes you need to compare and contrast. With a 30-card limit, this was difficult, but with the 23.4 patch, players can have more than 30 cards in their deckmaker.
What is the Overcap feature in Hearthstone?
You can add more than 30 cards to your decks by going to My Collection. Just add more cards until the deck exceeds 30 cards. This is an overcap feature that gives you more freedom to organize your cards. If you get out of that particular deck and switch to another deck, the extra cards still remain in the deck.
Related: What is the Hearthstone Mercenaries Y’Shaarj Event?
Essentially, the Overcap feature allows you to view multiple cards in your deck at once without having to immediately find the one you want to remove.
Can I play Hearthstone with an Overcaped deck?
You can’t play Hearthstone with an Overcaped deck. The game only allows you to play with the legal number which is 30. If you play Hearthstone and look at the decks you can use, it seems that the deck has too many cards. To continue using this deck, you can always go to My Collection and lower the cards to 30.
For more Hearthstone information, check out the Pro Game Guides here: How to Earn All Book of Heroes: Faelin Rewards in Hearthstone or How to Get Archangel Tyrael for Free in Hearthstone!
https://progameguides.com/hearthstone/how-to-overcap-decks-in-hearthstone/ How to cover decks in Hearthstone