Contagion

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

Connected above

The tree draws a line into Contagion from Summoner's Embrace or Grimoire of Sacrifice and Cull the Weak.

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  Summoner's Embrace

  Increases the damage dealt by your spells and your demon by 3%.

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  Grimoire of Sacrifice

  Sacrifices your demon pet for power, gaining its command demon ability, and causing your spells to sometimes also deal (37.2% of Spell Power) additional Shadow damage. Lasts until cancelled or until you summon a demon pet.

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  Cull the Weak

Connected below

Contagion leads on to Impetuous Wrath.

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  Impetuous Wrath

Same row

Also on this row: Malediction, Sudden Onset, Eye Contract, Malefic Grasp, Nether Plating and Sacrolash's Dark Strike.

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  Malediction

  Increases the critical strike chance of Agony, Wither, and Unstable Affliction by 5%.

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  Sudden Onset

  Agony damage is increased by 10% and starts at 3 stacks.

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  Eye Contract

  Increases the duration of Summon Darkglare by 5.1 sec.

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  Malefic Grasp

  While Darkglare is active, your Drain Soul becomes Malefic Grasp. Binds the target in twilight, dealing (1053% of Spell Power) Shadow damage over 4 sec. When Malefic Grasp deals damage, it causes all of your other periodic Affliction damage effects to instantly deal 30% of their normal periodic damage.

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  Nether Plating

  Adorns your Darkglare with armor forged from within Antorus, increasing their armor by 10%. Eye Beam now jumps to up to 4 additional targets within 10 yards and deals 10% increased damage.

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  Sacrolash's Dark Strike