Blood Boil
Spell deathknight bloodboil
  • Blood Boil
  • 1 Blood
  • Instant
  • Boils the blood of all enemies within 10 yards, dealing X Shadow damage. Deals 50% additional damage to targets infected with Blood Plague or Frost Fever.
Usable by
ClassDeath knight
Casting timeInstant
Cooldown (GCD 1 sec)
Level required55
TCG image
There is only one way to ease the pain: death.
- Rantuko Grimtouch TCG

Blood Boil is a death knight AoE damage spell available at level 55. It causes additional damage to diseased targets. Unlike Death and Decay, Blood Boil does not generate any Runic Power when used outside of combat.

Modified by

Unholy specialization

Tips and tactics

  • As a tank, Blood Boil is very useful for picking up stray mobs while your other AoE abilities are on cooldown.


Prior to Patch 3.1.0, Blood Boil did no damage to targets with no diseases on them. Hence one would first stack the target with diseases, then use Pestilence to spread them to nearby mobs and then use Blood Boil. This is still an effective method of boosting Blood Boil's damage, however Blood Boil can now be used to do some damage even to undiseased enemies. Using Blood Boil in this fashion is primarily useful when tanking or for killing swarms of low-health targets.

Patch changes

  • Warlords-Logo-Small Patch 6.2.3 (17-Oct-2015): Damage has been increased by 10%.
  • Wrath-Logo-Small Patch 3.1.2 (2009-05-19): If no target is available for Blood Boil to hit, the spell will now cast and consume a blood rune but generate no runic power.
  • WoW Icon 16x16 Hotfix (2009-04-16): "Blood Boil should no longer penetrate Ice Block or Divine Shield. [1]"
  • Wrath-Logo-Small Patch 3.1.0 (14-Apr-2009):
    • Damage increased to make up for Pestilence no longer doing damage.
    • Now does some damage to undiseased targets and extra damage to diseased targets. Its damage radius has been decreased to 10 yards.
  • Bc icon/ Wrath-Logo-Small Patch 3.0.2 (14-Oct-2008): Added.


  1. ^ Blizz Bornakk 2009-04-16. Recent In-Game Fixes - 4/16/09. Retrieved on 2009-05-24.

External links

Community content is available under CC-BY-SA unless otherwise noted.