You will need to spend some silver coins to achieve a boost card

Increasing the Card XP,  d3 items Attack and Defense attributes of a particular card can be very useful in battle. One way to increase card stats is to boost them.

To boost a particular card, click on the Boost menu button. Select Base card by clicking on Change base Card for boost.
Next, select the Booster card by scrolling down and selecting the Use This Card as Booster button. diablo 3 items  You will need to spend some silver coins to achieve a boost card.

Once you’ve selected the base and booster card, scroll down and click on Boost. You will get a card with increased stats.
Another way to increase the stats and mastery rating of a card is to use the same card in every battle.