[quote=@thewizardguy]
Couple of questions.

1) What is 'Holy Darkness'? Or other 'Holy' elements, for example?
2) If a Darkness user draws from darkness, then does his absorption create light? And does a Light user create darkness when they do the same?
3) If the answer to 2 is yes, then could a light and dark user together form a sort of super-battery?
4) Could 2 people of the same element have different powers based on their specialty?
[/quote]

Good questions! Since the Aedis "have a holy mandate from the Creator, the god of good, to protect those who cannot protect themselves, to root out evil in the world" I think Holy powers probably have some ability from the creator to banish or smite evil, or maybe to detect it. Like how in some stories holy water burns demons. Evil probably couldn't stand the presence of holy light or darkness.
I could see darkness being created when someone saps light from a room, but I'm not entirely certain if it would work the other way around. Take away light and you get darkness, take away darkness and you get... nothing? As a force it's a little weird to work with.

Here's what the GM said abut powers and specialties:

[quote=@The Mighty Hero]
<Snipped quote by Cherrywitch>

 That's a little complicated. Technically, you have the ability to use all of them but to varying degrees which are dependent on your skill and other factors such as training and energy level. The other technicality is any power that specifies it is a Holy/Evil(or Dark) power requires you be in the favor of the appropriate deity. Most Aedis are followers of the Creator as he is the one who created their order. Aedis who follow the "evil" god, Amunet, usually do so in secret. The Creator is the only god aside from Amunet and some small cults in this world.

[/quote]

Hope this helps a little... I'm no GM though, so I'd wait for his answer before taking my word for anything ^_^