There are several challenges in clash Royale there are card challenges for when there is the release of a new card. There are also touchdown challenges and draft challenges. These help players get rewards such as things like gold,chest,gems, and cards. There are classic challenges which are when you have 3 lives till you are removed from the challenge and there are also special challenges, these types of challenges are for low experience players. They are not as high rewarding but are still slightly rewarding. Some of these have multiple stages such as the beginners round which is a special challenge and then. There is a classic afterwards depending on the type of rewards. Some special challenges can reward high gems such as 100 gems or up to 40,000 gold depending on your consistency of playing the game and winning the battles. Sometimes you have to earn points by wins or crowns like in regular battles.