Morbidity

In the Unholy Death Knight talent tree, Morbidity sits in the Unholy specialization talents, row 7 of 11. It is a single-point node. Its row opens once 8 points are spent in Unholy Talents.

Connected above

The tree draws a line into Morbidity from Ebon Fever and Cycle of Death.

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  Ebon Fever

  Plagues deal 15% more damage over time in 125% of their duration.

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  Cycle of Death

  Putrefy reduces the cooldown of Death and Decay by 1.1 sec.

Connected below

Morbidity leads on to Blightburst.

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  Blightburst

  The explosion effect of Putrefy extends the duration of your plagues by 3.1 sec and deals 35% of the damage they would deal over that time instantly. Putrefy now applies your plagues to unaffected targets.

Same row

Also on this row: Harbinger of Doom, Raise Abomination or Summon Gargoyle, Unholy Devotion and All Will Serve.

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  Harbinger of Doom

  Sudden Doom triggers 30% more often and can accumulate up to 2 charges.

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  Raise Abomination

  Army of the Dead now raises an Abomination for 30 sec to attack enemies while emitting a disease cloud, dealing (35% of Attack Power) Plague damage to nearby enemies every 2 sec.

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  Summon Gargoyle

  Army of the Dead now summons a Gargoyle into the battlefield to bombard your enemies for 25 sec. The Gargoyle gains 1% increased damage for every 1 Runic Power you spend and always critically strikes.

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  Unholy Devotion

  Putrefy causes your permanent Ghoul to go on an unholy frenzy, increasing its attack speed and energy regeneration by 25% for 12 sec. Multiple applications may overlap.

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  All Will Serve

  Raise Dead summons an additional skeletal archer at your command that shoots Blighted Arrows. An unholy arrow that deals (34% of Attack Power) Shadow damage. When consuming Sudden Doom, your Death Coil commands your archer to fire an additional Blighted Arrow at 80% effectiveness. Epidemic will instead cause Blighted Arrow to ricochet and hit up to additional targets.