[quote=@Etcetera]
<Snipped quote by Darlit Glitch>

Describe how they function, if you will.
[/quote]

Oh, ok then.
They drain the energy of things that enter and/or are within the zone its self, including life force. So this in turn causes any powers or abilities used within a nul zone to be cancelled or reduced.
Now, they don't drain all of the energy, just part of it, so an energy attack that passes through will be reduced as well, even after leaving the nul zone, though enchanted items will return to normal once they leave. That energy is either sent to me or stored in the nul zone, depending on my needs, and if a nul zone is saturated with stored energy, it will expand to use part of it and allow for more energy storage. All nul zones are linked to me and I am exempt from their effects, but they can't transfer energy between dimensions or tell friends from foes.