Barely clinging to life, Sylvanas Windrunner was brought before Arthas in his dark temple. She protested, saying she deserved a clean death, but Arthas, having had to fight her every step of the way, responded by telling her after what she had put him through the last thing he would give her was the peace of death. She was tortured, mutilated, and finally killed for Arthas’ pleasure. He desecrated her spirit, corrupting her body and soul, and brought her back as a whirlwind of torment and hatred. Thus, Sylvanas Windrunner became the first of the high elven banshees. Sylvanas, now an undead banshee, was a complete and total slave of the Lich King.