DK Unholy Builds
Unholy (17/00/54)
Unholy plays a bit like a combination of Blood and Frost. Your rotation is very similar to Blood in that you only apply diseases once per rotation, but you're using an FU rune attack with BS to pick up Death Runes. At lower gear level, Unholy is extremely competitive with Blood, even at time surpassing it, mostly because Scourge Strike is a magic attack, hence it ignore armor and doesn't require you to have as much armor penetration as Blood does. Unholy relies on Gargoyle has its big dps ability, it's very important to know that Gargoyle take a snap shot of your character when it is cast and then does dps according to the atk power you had at that moment. The best way to use Gargoyle is to wait until your fully buffed with as many proc as possible up, and then use any attack power increasing trinket you have before summoning it.
Unholy's raid buff come from Unholy Aura and Ebon Plaguebringer. Unholy Aura is a rather unique buff that will increase raid dps and survability on any fight where mobility is important - and that is a lot of them. Ebon Plaguebringer boost magic dps and diseases (helping out other Death Knight at the same time) damage, however it doesn't stack with a Moonkin's similar debuff.
It's also a very AoE-friendly build, thus very good for trash and AoE grinding. Unholy also pills up the damage via the Wandering Plague talent, giving a chance to every disease to hit twice per tick.
You also get permaghoul (i.e. a ghoul that's much like a warlock's pet) with this spec.
A really important thing to know, is that while Crypt Fever/Ebon Plaguebringer count as Disease for the purpose of calculating Blood Strike and Scourge Strike damage, it only count for the first Unholy DK that applies it. This mean that having more then one Unholy DK in a raid/party is counter productive, as one of the two will inevitably lose one of his 3 disease and this will greatly hurt his dps.
17/0/54:
PS -> IT -> BS -> BS -> SS -> UB
SS -> SS -> SS -> DC
The UB (Unholy Blight) at the end of the first line indicates a RP dump before continuing on to the second line. You then dump RP into DC, and switch back to UB at the top of the rotation.
Death Runes
They need their own section. Each tree will have their own Death Runes, which are runes that switch from their normal form to a "Death Rune" which can be used as any type of rune. Death Rune Mastery (DRM) in the Blood tree converts an Unholy and a Frost rune to a Death rune each time an FU ability (DS/OB) is used, allowing for more HS in the second section of the rotation. The other trees have much the same in the talents "Reaping" (Unholy) and "Blood of the North" (Frost).
