Weekly4： Card System
By equipping cards, you can give your character a boost in stats and a variety of special abilities. Each card consists of a Primary-Attribute or Effect, and a Sub-Attribute or Effects. You can obtain the cards from completing matches, shop, and events reward.
Card Upgrade：
You can consume 6 cards of same Level, upgrade them to a higher level card (S Level cards cannot be upgraded). The main-attribute of the resulting card will be chosen randomly from the main-attribute of the consumed card.
*An attribute or efffect that suits you can often have a greater impact on the battlefield than a purely stats advantage.
Card Exchange:
You can consume 3 cards of same Level, exchange them to a same Level card with different main-attribute.
*When you consume S-Level Cards, there is a chance to get a dual-main-attribute card as result.
Card Upgrade：You can consume 6 cards of same Level, upgrade them to a higher level card (S Level cards cannot be upgraded). The main-attribute of the resulting card will be chosen randomly from the main-attribute of the consumed card.
*An attribute or efffect that suits you can often have a greater impact on the battlefield than a purely stats advantage.
Card Exchange:
You can consume 3 cards of same Level, exchange them to a same Level card with different main-attribute.
*When you consume S-Level Cards, there is a chance to get a dual-main-attribute card as result.