People who play Clash Royale like me really, REALLY like the special challenges. It is a very fun way to play the game while waiting for your chests to unlock. However, the special challenges cost Gems to play. Supercell addressed this by making all special challenges available for free in friendly battles. However, these special challenges last a limited time. When the special challenge expires, The option to play a special challenge in a friendly battle expires as well. The only thing I ask is that these special challenges stay in friendly battles permanently. Thank you Supercell for everything you've done!