3.2.0:
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Due to significant talent changes, all death knight talents will be reset for players.
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Blood Plague: Damage done increased by 15%.
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Chains of Ice: Now reduces movement by 95% instead of 100%. The main effect of this change will be that targets of Chains of Ice will not have to re-issue a movement command to continue moving.
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Frost Fever: Damage done increased by 15%.
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Frost Presence: 10% bonus health reduced to 6% bonus stamina.
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Frost Strike: This ability can now be dodged, parried, or blocked. Weapon damage bonus reduced to 55%, down from 60%.
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Icebound Fortitude: Cooldown increased to 2 minutes.
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Talents
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Blood
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Bloody Strikes: This talent now provides 5/10/15% increased damage to Blood Strike instead of 15/30/45%.
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Dancing Rune Weapon: This ability now has a fixed duration of 12 seconds (which can still be modified by its glyph) and a fixed cost of 60 runic power.
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Veteran of the Third War: Stamina bonus reduced to 1/2/3%.
o
Frost
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(Spell #61434): Reduced to a 3-point talent. Increases Blood Strike and Frost Strike damage by 5/10/15%. There is now a 33/66/100% chance whenever you hit with Blood Strike or Pestilence that the Blood Rune will become a Death Rune when it activates.
+
Lichborne: Duration reduced to 10 seconds, and cooldown reduced to 2 minutes.
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Threat of Thassarian: New 3-point talent. When dual-wielding, your Death Strike, Obliterate, Plague Strike, Blood Strike and Frost Strike have a 30/60/100% chance to also deal damage with your off-hand weapon. Off-hand strikes are roughly one half the effect of the original strike.
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Toughness: This talent now grants 2/4/6/8/10% armor instead of 3/6/9/12/15%, placing it in line with similar abilities of other classes.
o
Unholy
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(Spell #55670): This talent has been reduced to 2 points for 25/50% snare and no longer increases damage done by the death knight. It has also been moved one tier earlier in the tree and its spell effect has been made more transparent.
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Desolation: New talent. This talent is in the position formerly occupied by (Spell #55670). It causes Blood Strike to increase all damage the death knight deals by 1/2/3/4/5% for 12 seconds.
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Scourge Strike: Weapon damage bonus reduced to 40%, down from 45%. Damage increased by 10% per disease on the target, down from 11%.
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Summon Gargoyle: The gargoyle now flies lower to the ground, making it susceptible to melee attacks. This ability now has a fixed duration of 30 seconds and a fixed cost of 60 runic power.
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(Spell #51379): This talent has been redesigned. It no longer deals damage to nearby targets. Instead, when you deal damage with Death Coil, the target will take periodic damage for 10 seconds equal to 30% of the damage done by Death Coil. This damage accumulates in the same way as Ignite and Deep Wounds.

3.2.2
Death Knight

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Frost Presence: The damage reduction granted by this ability has been increased from 5% to 8%.
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Pets
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Gnaw: This death knight ghoul ability now has a 1-minute cooldown.
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Talents
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Blood
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Heart Strike: Secondary targets of Heart Strike now take half as much damage.
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Subversion: Now also increases the critical strike chance of Scourge Strike by 3/6/9%.
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Vampiric Blood: Cooldown reduced to 1 minute and duration reduced to 10 seconds.
o
Frost
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Threat of Thassarian now also causes Rune Strike to use both weapons when dual-wielding.
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Unbreakable Armor: Cooldown reduced to 1 minute and changed back to granting 25% additional armor while active instead of flat damage reduction based on armor. The amount of strength granted has been reduced to 10%.
o
Unholy
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Bone Shield: This ability now has 3 charges instead of 4. Cooldown reduced to 1 minute.
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Dirge: This talent no longer grants additional runic power from using Obliterate.

3.3.0:
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Army of the Dead: The cooldown on this ability has been reduced from 20 minutes to 10 minutes. Army Ghoul damage dropped by 50%. Cannot be used in Arenas.
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Raise Ally: The cooldown on this ability has been reduced from 15 minutes to 10 minutes. Cannot be used in Arenas.
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Rune of the Stoneskin Gargoyle: There is now a 1-handed version of this rune in addition to the current 2-handed rune.
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Rune Strike: Threat generated by this ability increased by approximately 17%.
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Talents
o
Unholy
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Night of the Dead: Now reduces the damage your pet takes from area-of-effect damage by 45/90%, but no longer applies to area-of-effect damage caused by other players. In addition, this talent now reduces the cooldown of Army of the Dead by 2/4 minutes, down from 5/10 minutes.
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Scourge Strike: Redesigned. The base ability now deals 50% weapon damage plus an additional amount as physical damage. However, for each disease the death knight has on the target, the target will take additional shadow damage equal to 25% of the physical damage done.
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Unholy Blight: This talent now deals only 10% of Death Coil damage as a damage-over-time effect on the target.

El nerfeo es bastante grande... creo q uno de los mas importantes en Blood es el del Hearth Strike... pero bue, ya veremos...