[Champion Concept] Shadow Isles Mage

Alright, so after seeing the Shadow Isles Crest back in October/November, I thought it had the potential to be a Shadow Isles Mage. I have no clue what her kit would be or what she would do, but she looks like an interesting start.

Maybe her kit would involve souls; but I know Kalista takes people's souls who want revenge and Thresh is all about taking the souls of those he wants to torment.

Possible Ideas: ~was able to escape from Thresh's lantern, but only a spirit, losing her physical form ~~makes her seems more like a woman living in fear and sorrow ~one form of spirit who died on the isles, like a lost traveler ~~less personality given to her ~angry, vengeful spirit ~~not sure what this could be, but a possible route to take her

So, any other possible theories or starting blocks that could help build this character?