Mutant
Too many Divine existences, Gods, and Fiends, as well as planets that were not reigned by a single existence were deemed outlawed.
Everyone could claim the planet for themselves, as long as they had the capabilities of doing so. Thus, some called such planets 'playground'.
Nobody followed any set of rules when conquering a new planet. However, there were certain things or unwritten rules everybody adhered to.
First of all, everyone was supposed to ensure that they provided the planet with adequate and balanced nourishment so as to prevent it from reaching a state of chaos caused by the creation of Hyper mana-dense areas.
There were several other things one had to pay attention to when joining the conquest of a battle, but fairness had never been included.
Everyone could do whatever they wanted to, even if that meant the destruction of the entire planet or the extinction of life on the planet.