The Chosen Ones

Ok so my idea will be a spell that allows the Esper to have an electric feedback to the enemies. Basically, when the esper attacks you, it will gain an energy ball around the esper. Once it has 10 energy balls it will cause a huge damaging AoE explosion to the surrounding heroes. However, it will take 2 seconds before another ball can appear if one was just spawned. The heroes will have to run back quickly and use ranged attacks once the balls get around 7 or 8 because once it gets to 9 it can quickly go to 10 without you escaping in time and if you are close to it, it's bye bye heroes health.

This can work for both when you fight the boss and when you use the esper.

Well that's my idea.