Coil of Devastation

In the Unholy Death Knight talent tree, Coil of Devastation sits in the Unholy specialization talents, row 6 of 11. It is a single-point node. Its row opens once 8 points are spent in Unholy Talents.

Connected above

The tree draws a line into Coil of Devastation from Festering Scythe and Superstrain.

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  Festering Scythe

  Festering Strike now follows up with a Festering Scythe that costs no Runes. Slashes through all enemies within 14 yds in front of you, dealing (101.2% of Attack Power) Shadow damage and hastening all of your plagues on targets hit to deal damage 35% faster for 25 sec.

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  Superstrain

  Dread Plague deals damage to an additional nearby enemy at 75% effectiveness and has a chance to grant you 4 Runic Power.

Connected below

Coil of Devastation leads on to Harbinger of Doom.

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  Harbinger of Doom

  Sudden Doom triggers 30% more often and can accumulate up to 2 charges.

Same row

Also on this row: Cycle of Death, Army of the Dead, Reaping, Menacing Magus and Ghoulish Frenzy.

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  Cycle of Death

  Putrefy reduces the cooldown of Death and Decay by 1.1 sec.

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  Army of the Dead

  Summon or empower Lesser Ghouls to form an unholy army of 8. While active, summoning a Lesser Ghoul will instead execute Orders based on nearby enemies. Death Orders Lesser Ghouls strike with you, dealing Shadow damage to your target. Epidemic Orders Lesser Ghouls erupt in viscera, dealing Shadow damage to nearby enemies. Deals reduced damage beyond 5 targets.

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  Reaping

  Scourge Strike, Festering Strike, and Death Coil deal 30% additional damage to enemies below 35% health. Dark Transformation resets Soul Reaper's cooldown and allows it to be used on any target.

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  Menacing Magus

  Your Magus of the Dead Shadow Bolt now fires a volley of Shadow Bolts at up to 8 nearby enemies. Your Lord of the Dead Frostbolts now chain to 3 additional enemies.

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  Ghoulish Frenzy

  Dark Transformation increases the attack speed and damage of you and your Monstrosity by 5% for 15 sec.