Every Embermage should make sure they use it well. This makes Embermages very strong offensive characters.
Once it reaches maximum, you enter a supercharged state for 12 seconds where all your skills are free to cast and do 25% extra damage. If you don’t deal damage for a while, the bar will start to rapidly decrease again. The charge bar at the bottom fills up as your character deals damage.
Torchlight 2 Embermage Comprehensive Guide by FishofMuu
