So I partied with my first DeathKnight last night in The Old Kingdom instance. I believe blood spec, but I never checked his talents so I am not positive. I was the Feral druid tank and we had another feral and a priest along with a deathknight and a Ret Paladin.
First off, that blood aura thing? ridiculously ridiculous. Even works with LotP heals and the party probably generated half the health they lost right back from attacks and the priest never had to actively heal anyone but me.
The DK also kept setting off some kind of battle horn buff that greatly increased my attack power (threat gen) and dodge% and it was constantly up.
And what's with the pet blood worm things haha.
I want a deathknight in all of my parties from now on. Please level faster.