Quietus

In the Affliction Warlock talent tree, Quietus sits in the Soul Harvester hero talent tree, row 4 of 5. It is a single-point node.

Connected above

The tree draws a line into Quietus from Shared Fate or Feast of Souls.

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  Shared Fate

  When you kill a target, its tortured soul is flung into a nearby enemy for 3 sec. This effect inflicts (50.7% of Spell Power) Shadow damage to enemies every 1 sec. Deals reduced damage beyond 8 targets.

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  Feast of Souls

  When you kill a target, you have a chance to generate a Soul Shard that is guaranteed to be a Succulent Soul.

Connected below

Quietus leads on to Shadow of Death.

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  Shadow of Death

  Your Dark Harvest spell is empowered by the demonic entity within you, causing it to grant 1 Soul Shard that each contain a Succulent Soul every 1 sec while channeled.

Same row

Also on this row: Wicked Reaping, Sataiel's Volition and Eternal Hunger.

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  Wicked Reaping

  Damage dealt by your demonic soul is increased by 10%. Consuming Nightfall feeds the demonic entity within you, causing it to appear and deal (601% of Spell Power) Shadow damage to your target.

• 
  Sataiel's Volition

  Corruption deals damage 25% faster and Haunt grants Nightfall.

• 
  Eternal Hunger

  Increases the duration of Manifested Avarice by 5 sec and increases the damage of Soul Swipe by 10%.