While adventuring in a special event, you will need special resources from the event map to complete quests. From time to time, you might run out of them, and there won't be any left to gather from the map. However, there is a solution! 💡
 
You will find a building designed for producing special event items in exchange for energy in each special event. This process is pretty similar to collecting event resources from the map. 
 
This building is always located at the beginning of the event map and looks like a tent:
 
 
To produce the required resource, you need to select it in the Tent and tap ‘Start’: