Why isn't sylvanas allowed to die?

[Faelinthia-moknathal (Faelinthia)]

Night Elf Player Hate

Sylvanas steps into the beam of light, and her undead red eyes are suddenly changed to gold. Fiery, golden wings burst from her back, and her armor is changed to take on a more divine appearance. Her hand trembles as she picks up the Ashbringer in one hand and the Doomhammer in the other. Somehow, both weapons found her worthy, and they burned with a power unlike ever seen before. Tyrande, awed, hangs her head in shame and turns, looking over to Anduin. “You were right… My King,” she says, kneel…