Semi-spoiler for my book. I say semi-because this isn't completely written yet, and I have the idea, but I won't divulge everything just yet.

A look back into the past before the current archmage was what he is during the setting of the book...

and if you can understand that phrase above, I will tip my hat to you.

Basically, this is a flashback to Tigress's younger days. She's telling her friends and companions about the current archmage's past and what became of him later on to make him what he was, but I'll say no more. I'll give too much away.