From Dragon Mania Legends (DML) Wiki
Arena Energy is the energy used each time a battle is fought in the Dragon League. Arena Energy automatically regenerates at 1 every 1 hour and 30 minutes, up to the maximum base amount. It can also be purchased with Gems (at the cost of 25 Gems per energy), or through leveling up. Both methods fully replenish the energy, and there is no option to select the amount of energy to replenish. The only way to replenish smaller amounts of energy is to use small amounts at a time, and then replenish the amount remaining to maximum. Arena Energy is refilled by pressing the + button on the Dragon League main screen, or by trying to engage a battle without any energy left (which opens the refill screen, where energy can be refilled using Gems). Energy can also be received from events, or by using the related Clan Fortress Power if the Trainer is a member of a Clan.
The base amount of energy is four. There is no way to increase the maximum base amount of Arena Energy other than by purchasing VIP Status. VIP levels 1-9 receive two energy units, VIP levels 10-18 receive three energy units, and VIP levels 19-20 receive four energy units (thus the Trainer can have a maximum of eight energy units).
The total amount of energy a Trainer can have is unlimited. Any energy gifted or rewarded is added to the current amount, which displays in green if overloaded (more than the base amount). Overloading stops the automatic regeneration of energy until the amount drops below the base amount again.
Fighting in the Dragon League requires 1 energy for a regular battle and two energies for a focused attack. A focused attack temporarily enhances all the Trainer's Dragons' current Attack by 50% for that battle.
See Battle Energy for more information.
- Update 6.2: Introduced.