In the beginning, there was a Void. Though it is a void, it can create. It can, therefore it is. Not much is known about the Void, except that it’s called the Darkness Within.
The Void did not give birth to Anivia Rose, instead, it listened to her Darkness. She hoped and wished for power, succumbing to the Darkness. She was inside the Void, and the only way to get out was to bargain with it.
“My Champion.”
And so she walks the lands, and with her, The Darkness Within.