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Comment by Saliuna

This ability is quiet efficient for maintaing some aggro, kind of druid's http://wotlk.wowhead.com/?spell=48562 .

Comment by mrdeath212

does this spread the blood or frost plagues? or just specificly diseases such as the effect of plague strike.

Comment by xvim

It spreads all diseases (including those from other classes and weapon procs). To see more, look at the comments on the highest rank.

Comment by caridor

spreads all diseases. excellent when followed by either a howling blast (http://www.wowhead.com/?spell=51411) or a blood boil (http://www.wowhead.com/?spell=49941)

its excellent in a tanking rotation as well because it spreads frost fever, reducing the amount of attacks you take.

Comment by tomgc

Nerfed to only spread DK diseases to the targets.

Comment by Nadirah

Requires level 56.
Training cost 56s.

2(Range^2)+Range+Cost=56!

Spooky

Comment by Toontang

Tanking Perspective Post - Very important in AOE Tanking

(short range pull a mob with) Icy Touch -> (Mob is on you - GCD) Plague Strike -> (He friends are there too) Pestilence (Spreads both Diseases)

At this point you have one frost one unholy one blood free -> Death and Decay -> mobs just ain't ain't moving unless you have a nasty dps with bad targeting. You may choose to DnD first but i have found that in most cases i don't need DnD at all, yet i use it anyway at lot of time. For this reason I cast it last because i want the full time and affect on the mobs. If you are always going to use DnD you may want to use it first to get those runes back faster.

I have been in some groups where i just MUST use DnD first because of the way the healer and dps are playing. The healer casts heal when i'm at 99.9999% health, the mage runs way off to the side and wants to Blizzard on a pull.

Here is a decent thread on rations. Note that I said thread not post as i think the debate that follows is very helpful too.

Edit: I don't do this so much anymore. As frost, howling blast glyphed (Frost Fever) is enough. Almost never use this spell, i did however need it once, when i started, that may have been gear, knowledge, i don't know. But i don't use it much anymore. Perhaps I was not frost when I wrote this.

Comment by Keelerak

does this spreads only blood boil and icy touch, ro all dk´s diseases? (such as ebon plague)

Comment by mjblink

Ebon Plague is automatically applied to a target with any of your diseases on it which for me is either Blood Plague (caused by Plague Strike) or Frost Fever (caused by Icy Touch). This means that if any of your diseases successfully hop to the next target (they can be resisted), the target will automatically get Ebon Plague as well if you are specced for it.

Comment by DerSenf

My Pestilence seems bugged currently.
I have Blood of the North and whenever i use Pestilence, BOTH bloodrunes convert into deathrunes.
Anyone having the same issue?

Comment by mickytk

This is still happening in 3.2 as well, but dont complain too loudly because its really quite handy =)

Comment by Dinkyy

/script PlaySoundFile("Sound\\Creature\\Anetheron\\CAV_Anath_CarionSwrm02.wav")
Might go well macrod to pestilence for some people

(quote is Anetheron from Hyjal screaming "Pestilence upon you!")

Comment by Noromis

Pestilence+Blood Boil= awesome AoE

Comment by ronko

Seems this spreads diseases to stealthed enemy units too. I was dueling a rogue when I pulled a mob accidentally. Applied diseases to the mob and hit pestilence - It broke the stealth and rogue was infected with both diseases.

Comment by Gettor

Current description of this spell is not accurate, because it also spreads Ebon Plague (link to sufficient talent, which causes this disease).
Also i noted that if another DK is fighting something and they infect target with their own diseases, your pestilence won't spread them. Only yours.

Comment by DeusExMachina

A staple ability for Unholy AoE-DPS. Your diseases, along with everyone's favorite exploding plague-spot and (since we're in the age of 3.3 now) the second T9 set-bonus plus the Frost Fever Glyph will do most of your job for you.

Comment by sluggolito

Spread the joy!

Comment by Derren

If you're not lvl60 and tanking: dots,pestilence,blood boil helps.

Pestilence is ur friend! Dont forget to go blood presence if u tank. :P

Comment by somebody1002

Maybe it's obvious to most but I had to do some testing to be sure.

If you apply frost fever and blood plague to target A, use pestilence to spread your diseases to target B, then when the duration of your diseases is almost over you cast pestilence on target B to spread your diseases back to target A, the new diseases on target A will still tick for half the damage of diseases applied using icy touch and plague strike.

Or in short, your diseases will never tick for less than 50% of their normal damage no matter how many times you spread them via pestilence.

Comment by CJTheInvader

Wtfhax Aoe.

Trust me. if your unholy. And fighting a VERY large group of enemies "one time i saw about 50 enemies that could aggro eachother." This is much loved. Its one of your most prominent AOEs as a death knight.

Dont lose it :(

Comment by CrusaderFelbane

Now, with Dark Simulacrum, a skilled Death Knight can have seven diseases at a time.

Comment by Surge479

Anyone know if this is spell reflect able by warriors?

Comment by Desedris

This spell spreads your diseases to all enemies within 10 yards relative to where you're standing, not your targeted and diseased enemy to whom is being spread.

Comment by vindurza

first spell sent to Egypt

Comment by Whoisthiscook

It would seem they are abandoning Pestilence instead of Blood Boil. I wonder if it'll keep the Blood Boil visual?

Comment by Skullhawk13

Really wish we could get heart strike back...So AoE nerfs stop hurting our single-target.

Comment by kazana2

Blood boil for unholy DKs seems to be bugged atm with 6.1 , casting it with a death frost doesnt transform the rune back into death but simply reverts it to frost.

Comment by rodalpho

The devs told us exactly how this ability works in PvP at the link(s) below.

http://us.battle.net/wow/en/forum/topic/20747314610#2

I'm pasting it here as they typically delete the beta forums after release.

~~Blood Boil does 30% damage in PVP~~

Reverted on Nov 15 2016.

Blood: Blood Boil no longer has its damage reduced in PvP (was previously reduced by 70%)

Comment by heartlessnobody

now for Blood Dks only

Blood Boil
Instant 7.5 sec recharge
2 Charges
Requires Death Knight (Blood)
Requires level 56
Deals (375% of Attack power) Shadow damage

Soulgorge
to all enemies within 10 yds

and infects all enemies within 10 yds with Blood Plague.

Blood Plague
A shadowy disease that drains 0 health from the target over 24 sec.

not so puny now

Comment by l3uGsY

Blood Boil animation was improved on 7.2, I have submitted it, but I think with all the 7.2 PTR changes, Wowhead is a bit behind. So here it is

https://youtu.be/doPdC-GGm2o

Add to list...Links WeakAuras Export

Blood Boil

Blood Boil

Instant	7.5 sec recharge

2 Charges

Deals (30% of Attack power) Shadow damage and infects all enemies within 10 yds with Blood Plague.

Blood Plague
A shadowy disease that drains 0 health from the target over 24 sec.

Spell Details

Duration

n/a

School

Shadow

Mechanic

n/a

Dispel type

Disease

GCD category

Normal

Cost

None

Range

0 yards (Self)

Cast time

Instant

Cooldown

n/a

GCD

1.5 seconds

Effect

School Damage (Shadow) (AP mod: 0.3)
Radius: 10 yards

Guides

Blood Death Knight Rotation Guide – Battle for Azeroth 8.0.1

Blood Death Knight Talents & Build Guide – Battle for Azeroth 8.0.1

Legion Death Knight Changes

Overview of Tanking and All Tank Specs

Blood Boil

Buff

Spell Details

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