Abyssal Dominion

In the Demonology Warlock talent tree, Abyssal Dominion sits in the Diabolist hero talent tree, row 4 of 5. It is a single-point node.

Connected above

The tree draws a line into Abyssal Dominion from Cruelty of Kerxan or Infernal Machine.

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  Cruelty of Kerxan

  Summon Demonic Tyrant grants Diabolic Ritual and reduces its duration by 3 sec.

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  Infernal Machine

  Spending Soul Shards on damaging spells while your Demonic Tyrant is active decreases the duration of Diabolic Ritual by 1 additional sec.

Connected below

Abyssal Dominion leads on to Ruination.

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  Ruination

  Summoning a Pit Lord causes your next Hand of Gul'dan to become Ruination. Call down a demon-infested meteor from the depths of the Twisting Nether, dealing (2537.9% of Spell Power) Chaos damage on impact to all enemies of the target and summoning 1 Diabolic Imp. Damage is further increased by your critical strike chance and is reduced beyond 8 targets.

Same row

Also on this row: Flames of Xoroth, Gloom of Nathreza and Mind's Eyes.

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  Flames of Xoroth

  Fire damage increased by 4% and damage dealt by your demons is increased by 4%.

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  Gloom of Nathreza

  Hand of Gul'dan deals 15% increased damage for each Soul Shard spent.

• 
  Mind's Eyes

  Your Diabolic Oculi observe the battlefield and collect information that is imparted to you upon being exploded, each Diabolic Oculi increasing your Intellect by 2% for 10 sec.