Dark Harvest

In the Affliction Warlock talent tree, Dark Harvest sits in the Affliction specialization talents, row 5 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 Dark Harvest from Absolute Corruption or Siphon Life.

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  Absolute Corruption

  Wither is now permanent and deals 15% increased damage. Duration reduced to 24 sec against players.

• 
  Siphon Life

  Wither deals 30% increased damage and its periodic damage heals you for 5% of the damage dealt.

Connected below

Dark Harvest leads on to 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.

• 
  Cull the Weak

Same row

Also on this row: Cunning Cruelty, Withering Bolt and Creeping Death.

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  Cunning Cruelty

  Shadow Bolt and Drain Soul have a chance to trigger a Shadow Bolt Volley, dealing Shadow damage to 5 enemies of your current target.

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  Withering Bolt2 ranks

  Shadow Bolt and Drain Soul deal 5% increased damage, up to 15%, per damage over time effect you have active on the target.

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  Creeping Death2 ranks

  Your Agony, Wither, and Unstable Affliction deal damage 10% faster.