A tragic fate
Sylvanas is an important character in the history of the massively multiplayer online game World Of Warcraft, specifically the Wrath Of The Lich King expansion. She was a high elf who fought to protect the city of Silver Moon when the Lich King attacked but still lost the battle. To punish her, the Lich King took her soul and turned her into an undead and kept her by his side, as she was a powerful warrior. When the Lich King began to lose power, she took the opportunity to free herself but did not join the elves and created her own undead faction and the underground city of Fossoyeuse. She also ended up joining the Horde.