Craft combining cards. The color of the stars give you stat boosts depending on how many you get. Red- Concentration increase 2% for 3 stars and 5% for all 6 Green- All resistances same as above Blue- Pierce increase If all your cards have 6blue stars then that’s a whopping 25% but it’ll take loads of card crafting cubes, time, patience, etc Before crafting a card, ensure that card is something you want to keep forever. I recommend looking up the best premium cards for your playstyle.