[quote=@DarkFey]
Ok so this based on Puella Magi Madoka Magica, right?
[/quote]

Yup. It just also happens that here magical girls tried to take over the world because Social Darwinism, or something like that. OH, and taxes are in Grief Seeds, keeping rulers strong, and those beneath them too busy hunting Witches to meet said taxes, so they can't plot treason. Ideally.