Fiendish Cruelty

In the Destruction Warlock talent tree, Fiendish Cruelty sits in the Destruction specialization talents, row 6 of 11. It is a single-point node. Its row opens once 8 points are spent in Destruction Talents.

Connected above

The tree draws a line into Fiendish Cruelty from Shadowburn.

• 
  Shadowburn

  Blasts a target for (496.8% of Spell Power) Shadowflame damage. Only usable on enemies that have less than 20% health. Restores 1 Soul Shard and removes its cooldown if the target dies within 5 sec.

Connected below

Fiendish Cruelty leads on to Reverse Entropy.

• 
  Reverse Entropy

  Your spells have a chance to grant you 15% Haste for 8 sec.

Same row

Also on this row: Chaotic Inferno, Flashpoint, Summon Infernal, Emberstorm, Fire and Brimstone and Lake of Fire.

• 
  Chaotic Inferno

  Increases Chaos Bolt damage by 5% and Chaos Bolt now has a 25% chance to make your next Incinerate instant.

• 
  Flashpoint

  When your Wither deals periodic damage to a target above 80% health, gain 2% Haste for 10 sec.

• 
  Summon Infernal

  Summons an Infernal from the Twisting Nether, impacting for (60% of Spell Power) Fire damage and stunning all enemies in the area for 2 sec. The Infernal will serve you for 30 sec, dealing damage to all nearby enemies every 2 sec and generating 1 Soul Shard Fragment every 1 sec.

• 
  Emberstorm

  Increases the damage done by your Fire spells by 2% and reduces the cast time of your Incinerate spell by 20%.

• 
  Fire and Brimstone

  Incinerate now also hits all enemies near your target for 25% damage.

• 
  Lake of Fire

  Cataclysm now leaves behind a lake of fire that deals Fire damage to enemies within it over 10 sec. Wither deals 20% increased damage to enemies within the lake of fire.