Did you ever hear the tragedy of Arthas?

I thought not. It’s not a story the Horde or Alliance would tell you. It’s a Death Knight legend. Prince Arthas was a Dark Lord of the Scourge, so powerful and so wise he could use his necromatic powers create undeath… He had such a knowledge of necromancy, he could even keep the ones he cared about from dying permanently.
He became so powerful… the only thing he was afraid of was losing his power, which eventually, of course, he did. Unfortunately, he showed everyone everything he knew, then his adversaries killed him in cold blood. Ironic. He could raise others from death, but not himself.