The cards used in the game are set in. If you're creating a deck with Lost Ark Gold a lot of cards, the greater number you are able to include of the exact set, the greater the bonuses and buffs you'll be able to get from them.
This implies that using random cards from different sets will be significantly less efficient than equipping cards from the same set.
However, this doesn't mean that all 6 cards have to belong to the same set. You may choose to use as few as two or as many up to six different cards in the set. What you can choose to use is entirely dependent on what kinds of bonuses and effects you'd like for your character.
When you're placing cards into your deck, make sure to click on the "Set Effect Details" option over the set of cards, to see any bonuses that the set can offer you. This will help you select the card Sets you'd like to have to put in your deck.
How to Get New Credit Cards
Within Lost Ark, obtaining cards is very simple to accomplish. This is because cards can be found as collectibles during almost every single game play.
This can include missions that include dungeons vendors and more. While playing your game you'll automatically collect a variety of cards without ever trying to Lost Ark Power leveling.