You will be required to spend Campaign Energy in order to attempt battles and progress in the Campaign. Energy regenerates automatically until max Campaign Energy has been reached.

When you level up, your Campaign Energy will be refilled and any leftover Campaign Energy will be added, even if it goes over the maximum.

For example: Your current Campaign Energy is 18/21 (18 available and a maximum of 21). When you level up, 21 Campaign Energy will be replenished and your remaining Campaign Energy of 18 will be added for a total of 39/21 available Campaign Energy.

If you’re in immediate need of more Campaign Energy, you can skip waiting for it to regenerate by purchasing energy from the Store using Gold Dragons.

Reaching certain levels will increase your Max Campaign Energy.