The Hallow is a remnant of the grounds used by the Angels to group for battle. It is a holy place, filled with light and creatures of such, everything embodying perfection in it's finest form. The only imperfections are intentional ones.

The Hallow was not left unguarded at the end of the War, however; There are creatures embodying light that will attack vicously anything not completely good. Anything and anyone that enters that is not supposed to be there is in for a nasty surprise...