Define Keep What You Kill Meaning

Keep What You Kill
The Underverse is their promised land, believing that unless a person dies "in due time" that they will not go to the Underverse. They also believe heavily in a philosophy that says "you keep what you kill", believing that ending another's life entitles you to their property and position.

The Lord Marshal:
In our faith, you keep what you kill.
-The Chronicles of Riddick
By Ermentrude