Overcharged Aspect is a Druid Offensive Aspect that can be found by completing the Mariner's Refuge Dungeon as well as from random enemy drops. After clearing the Dungeon for the first time the Aspect will be available in your Codex of Power.
How to Obtain - Codex of Power - Mariner's Refuge
Overcharged Aspect Mechanics
Legendary Aspects can change the way skills and builds work in significant ways.
The damage dealt by the pulse is also dealt to the target that is Overloaded by Overcharged Aspect, making it benificial even for single target.
For further information, see our Build Guides, Legendary Aspects & Codex of Power
Overcharged Aspect