Null
The Null System, contains only it's long dead star, a Black Hole.
Although no one's gotten close enough to examine it in recent history - Null seems to continue to grow, as it always looks to be the same size in relation to the current front line that the The 9 Archdevils of Abaddon hold. And as it gets bigger, more Aberrations and Fiends spill out.
Type
Black Hole
Location under