Ally Of Chaos

An Ally of Chaos is someone who has been touched by Chaos and now can draw some measure of strength and power from chaotic energies. That is, when they are around powers or beings dedicated to Chaos, they are empowered for it.
An Ally of Chaos need not be a creature devoted to Chaos per se, but simply someone who has had a positive personal encounter with it. Anarchs and Barbarians Adepts are frequently Allies of Chaos. 
http://powerlisting.wikia.com/wiki/Chaos_Empowerment