Chaor rules from his castle-fortress that dominates the city. Life isn't easy in UnderWorld City; In addition to tremors and cave-ins, city dwellers have to worry about fire geysers. Whole neighborhoods have been engulfed by the flame-spewing jets, which erupt without warning. Chaor goes to extreme measures to protect his capital, believing it's better to lose part of the UnderWorld City than risk losing all.
If two UnderWorlders get into a fight, they fight in the colssuem. This decision was made due to the endless fighting in UnderWorld City.
The M'arillians temporarily conquered the UnderWorlders in Episode 23 when Lord Van Bloot and Phelphor's armies surprise Chaor's armies.