In your recent post regarding Worgen DKs, you mention about how the blood elves no longer have their addiction to magic. Wouldn’t they instead have the addiction to killing to compensate for that need for magic?

owlpellet:

Yes! That’s exactly why they no longer have it. The Endless Hunger overrides the fel/arcane addiction.

From the CDev questions:

Q: Are blood elf death knights still afflicted by their racial addiction to magic?
A: No, though their new addiction, the one all Ebon Blade death knights possess, is arguably worse: the need to inflict pain. If death knights do not regularly inflict agony upon another creature, they begin to suffer wracking pains that could drive them into a mindless, blood-seeking hysteria—a far worse fate than that of those who suffer from arcane withdrawal.