The Evolution.

Era beginning/end

In this time, life prospered. Most Imilios were content with creation and simply observed.

In these years, evolution took hold. Humans were a small species at the start. A tribal and hunter-gather society, stupid and unskilled. Unrecognizable from their modern counterparts.   These 13 worlds would be connected by the Imilios in some ways. Making each one accessible through magic or other means.   The humans and creatures of these eras evolved, each world eventually having humans on them.