Blightburst

In the Unholy Death Knight talent tree, Blightburst sits in the Unholy specialization talents, row 8 of 11. It is a single-point node. Its row opens once 20 points are spent in Unholy Talents.

Connected above

The tree draws a line into Blightburst from Cycle of Death, Harbinger of Doom and Morbidity.

• 
  Cycle of Death

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

• 
  Harbinger of Doom

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

• 
  Morbidity

  Diseased enemies take 1% increased damage from you per disease they are affected.

Connected below

Blightburst leads on to Scourging and Ancient Power.

• 
  Scourging2 ranks

  Scourge Strike now causes your Plagues to erupt at 65% effectiveness. Clawing Shadows can now stack 1 additional times.

• 
  Ancient Power2 ranks

  Multiple applications may overlap.

Same row

Also on this row: Putrid Echoes and Doomed Bidding.

• 
  Putrid Echoes

  Putrefy deals 20% increased damage, has 2 additional charges and consumes up to 2 available charges.

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  Doomed Bidding

  Consuming Sudden Doom summons forth a Lesser Ghoul to assist you for 8 sec.