Superstrain

In the Unholy Death Knight talent tree, Superstrain sits in the Unholy specialization talents, row 5 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 Superstrain from Plague Mastery or Grave Mastery and Foul Infections.

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  Plague Mastery

  Critical strike damage of your diseases is increased by 25%

• 
  Grave Mastery

  Critical strike damage of your minions is increased by 15%

• 
  Foul Infections

  Your diseases deal 10% more damage and have a 5% increased chance to critically strike.

Connected below

Superstrain leads on to Coil of Devastation and Army of the Dead.

• 
  Coil of Devastation

  Death Coil deals 10% increased damage and causes the target to take an additional 30% of the direct damage dealt over 4 sec.

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  Army of the Dead

  Summon or empower Lesser Ghouls to form an unholy army of 8. While active, summoning a Lesser Ghoul will instead execute Orders based on nearby enemies. Death Orders Lesser Ghouls strike with you, dealing Shadow damage to your target. Epidemic Orders Lesser Ghouls erupt in viscera, dealing Shadow damage to nearby enemies. Deals reduced damage beyond 5 targets.

Same row

Also on this row: Ebon Fever, Festering Scythe, Soul Reaper, Magus of the Dead and Infected Claws.

• 
  Ebon Fever

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

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  Festering Scythe

  Festering Strike now follows up with a Festering Scythe that costs no Runes. Slashes through all enemies within 14 yds in front of you, dealing (101.2% of Attack Power) Shadow damage and hastening all of your plagues on targets hit to deal damage 35% faster for 25 sec.

• 
  Soul Reaper

  Rupture the soul of your enemy, dealing (450% of Attack Power) Shadowfrost damage and causing the foe to take 20% increased damage from your diseases and minions for 8 sec. Only usable on enemies below 35% maximum health. Consumes up to 3 Lesser Ghoul stacks to summon them instantly.

• 
  Magus of the Dead

  Dark Transformation and Army of the Dead summon a Magus of the Dead who hurls Frostbolts and Shadow Bolts at your foes for 15 sec.

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  Infected Claws

  The infected claws of your ghouls have a chance to sicken the foe, dealing (15.6% of Attack Power) Shadow damage over 12 sec. When reapplied, any remaining damage is added to the new effect.