Five gods made an oath to test who was right about the nature of “True Good”. This True Good is the ultimate definition of what is right or wrong: be it so-called “good” or “evil”, “law” or “chaos”, or balance between them all. They all agreed to an oath of non-presence, declaring that they would not appear directly on the world where their experiment would be played out but work through intermediaries.
Creation began after the oath. Each began partaking in it, all interfering with each other’s grand design and blending all of creation with it. Some of creation leans one way or another, but all aspects are capable of all possible uses.
Thus the Ages began.