If you still have some coins from the festival, you can save it till the next time when festival returns."Troves are seldomly added, but all other recipes are usually available in the Festival Exchanger in Mirage. But the best advise is to use your festival tokens during the festival and not to wait for it to end." Wish i knew this in advanced Being my second festival since joining I expected to craft troves like i did after the winter festival ended. Well that was wasted time.