How to refill event energy?
The purchased event energy is added to your inventory as an item. In order to use it, you need to:
1. Open the event screen;
2. Tap on the energy bar on the top of the event screen;
3. You will see Energy Refill window;
4. Tap "use pack" to add energy.
Unused event energy items will be saved for the next event with the same type.