What's the use of clash royale magic items?

There are five kinds of magic items, namely wild cards, magic keys, magic cards, magic books and magic coins.

Simply put, the role of foreign cards is that the use of foreign cards can speed up the collection of cards of any quality and improve the process of upgrading cards.

The use of magic coins is more direct: the maximum number of magic coins you can have is one, and you can use magic coins to upgrade your card without spending any gold coins.

You can have at most 1 spell books, and the effect is quite powerful. The magic book can directly fill in the number of cards needed for upgrading without being limited by the rarity of cards! Simply put, it is to upgrade the card directly!

Magic cards, on the other hand, have rarity classification restrictions, which are the same as magic books, that is, they are filled to the number needed for upgrading, but they are used differently in rarity, and there is no limit on the number of cards they have.

Magic key, which can have at most 10, is simple and rude, and it is similar to the function of unpacking gems, aiming at speeding up the upgrade of cards.