Devastation

In the Destruction Warlock talent tree, Devastation sits in the Destruction specialization talents, row 8 of 11. It takes 2 points to fill. Its row opens once 20 points are spent in Destruction Talents.

Connected above

The tree draws a line into Devastation from Summoner's Embrace or Grimoire of Sacrifice.

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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.

Connected below

Devastation leads on to Diabolic Embers and Demonfire Infusion or Channel Demonfire.

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  Diabolic Embers

  Incinerate now generates 100% additional Soul Shard Fragments.

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  Demonfire Infusion

  Periodic damage from Wither has a 4% chance to fire a Demonfire bolt at 100% increased effectiveness. Incinerate has a 25% chance to fire a Demonfire bolt at 100% increased effectiveness.

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  Channel Demonfire

  Launches 15 bolts of felfire over 3 sec at random targets afflicted by your Wither. Each bolt deals (39.4% of Spell Power) Fire damage to the target and (19.6% of Spell Power) Fire damage to nearby enemies.

Same row

Also on this row: Ruin, Improved Chaos Bolt and Destructive Rapidity.

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  Ruin2 ranks

  Increases the critical strike damage of your Destruction spells by 15%.

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  Improved Chaos Bolt
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  Destructive Rapidity

  Increases how quickly Rain of Fire deals damage by 25% and how quickly your Infernal's Immolation deals damage by 10%.