Aura (POEE)

From LSWiki

Chaos Aura

• Energy Costs  : twenty-five points of chaos energy
• Process to Activate Power  : will my chaos aura to be <activated or deactivated>

This is the means by which you bring up or down your chaos aura, a defensive ability known for its unpredictability and various odd behaviors. The aura requires regular influxes of energy to maintain, and will dissipate if your spiritual energy runs too low, so be wary. Not that we really have to tell that to you guys (at least not those with good Paranoia scores). This power costs chaos energy to both activate and deactivate the aura, but when deactivating double the initial cost is refunded.

While you're in the Exoma with this aura on, you will see "You become intensely attuned to this place." and it seems you become mostly immune to random damage discharges, with possibly other as of yet unknown effects.