Angry Grimace said:You have at least five, usually more.
Blizzard does a terrible job explaining how the game works to newbies; this is why you have players at the end of the game that don't know how to do anything; because you're expected to go to an external source to figure out how to actually play.
With regards to Death Knights, it's not obvious how to play because they didn't bother to give you a Frost/Unholy rune strike, and they won't until 63 (Obliterate). I had a discussion about this with one of our top DKs and they were saying when they started, they figured you just put up your diseases and spammed Blood Strike :lol
It really depends on your spec. You almost invariably put your diseases with Plague Strike/Icy Touch, use a Frost/Unholy strike and then two Blood Strikes. Dump off your Runic Power with Death Coil.
I personally find that while Blood's self-healing is nice for leveling, you'll rarely get damaged all that much and it's much easier to level as unholy for the run speed and mounted speed increases.
I started leveling a DK just to use as a gathering bot and he is now about 66. I personally do not find the class fun at all and the only reason I'm leveling him is I get to skip 1-55. I've specced him Unholy for the bonus run speed and perma pets are nice for when I want to mine without getting interrupted.
I put up Ice Touch/Plague Strike and then Scourge Strike. If they are still alive and above 15%, I'll throw out a death coil. That rotation was developed after spending 30 seconds looking at my spell book and flying to Outland. I'm not even sure I've visited a trainer since 58. What is the best rotation for my level and spec?