The Ancient Borders separate the territorys of the different cultures from each other.
Each culture has it's own creation myth, which happened to create their own world. When the worlds started to get instabil the different cultures met and it was decided to connect the worlds to a much bigger single world. The territorys were placed side by side and there was a stabilizing period of peace.
Fight for Land Edit
Soon there were fights over the neighboring territorys and the gods who lead the Council of Gods decided to raise Borders to separate each territory. Their own godly powers were now restricted to their own land and would mostly be taken on foreign ground. A demigod's powers are compleatly gone when leaving their own territory.