Energy is a special resource required for participating in events. You can use it to clear the map of objects (stones, trees, bushes, grass, etc.), complete tasks and advance the search for quest items.
Energy isn't infinite — it builds up. A full energy bar has 200 units of energy. Energy regenerates at a rate of 1 unit per 30 seconds.
The amount of energy needed for regular and temporary expeditions and the Olympics is the same. Energy can also be purchased for Gems during an event.