Millennium Witch

Leo found himself transported into a desolate wasteland, the remnants of a once-thriving magical civilization. There, he became Yvette – an immortal witch who could neither age nor die.
For over a thousand years, Yvette lived in seclusion, hiding from the dangers of the ruined world, But now, at long last, she has decided to step out of the shadows.
Only then does she realize a something unexpected: She may be the last surviving soul of that lost civilization.