Elf Love: SFW: Sylvanas Windrunner by Kalology

During the Undead campaign of Warcraft III you killed her and turned her into a slave. After the defeat of the scourge at the end of Warcraft III she formed a loose group of undead who weren't particularly happy with being zombies, slaves to the demons, or hunted and killed by the Alliance so she claimed a ruined city as her own and made the best of things.