1) kill any non hollows.
2) Obey the Hollow king at all times.
3) don't complain, or you will be eaten by the first person stronger than you that you annoy.
4) the hollow king reserves the rights to add rules at whim.
5) If you are above the level of hollow marked in parenthesis, you do not eat player controlled hollows in this area. This is to give the young ones a chance to grow.
6) If you are below the level of hollow marked in parenthesis, rule three is multiplied for you. You are food. There are no rules to protect you. I know this means e ranked have less places they can safely go. I know conditions are worse for the lower ranked. But that is the wild.