Maddening Tentacles

In the Shadow Priest talent tree, Maddening Tentacles sits in the Shadow specialization talents, row 8 of 11. It is a single-point node. Its row opens once 20 points are spent in Shadow Talents.

Connected above

The tree draws a line into Maddening Tentacles from Shattered Psyche and Instilled Doubt.

• 
  Shattered Psyche

  Lasts 10 sec.

• 
  Instilled Doubt2 ranks

  Increases the critical strike chance of Vampiric Touch and Shadow Word: Pain by 8% and their critical strike damage by 20%.

Connected below

Maddening Tentacles leads on to Insidious Ire and Crushing Void.

• 
  Insidious Ire2 ranks

  While you have Shadow Word: Pain, Shadow Word: Madness, and Vampiric Touch active on the same target, your Mind Blast, Void Torrent, Mind Flay, and Void Volley deal 20% more damage.

• 
  Crushing Void

  Tentacle Slam deals 50% increased damage and Void Volley deals 15% increased damage. When Voidform ends, you can cast Void Volley 1 additional times within 30 sec.

Same row

Also on this row: Mindbender, Deathspeaker or Death and Madness, Mind Devourer and Auspicious Spirits.

• 
  Mindbender

  Casting Voidform summons a Mindbender for 10 sec. Summons a shadowy fiend to attack your target. Generates 1 Insanity each time the Mindbender attacks.

• 
  Deathspeaker

  Shadow Word: Death damage increased by 25%. Shadow Word: Death gains its damage and talent bonuses against targets below 35% health instead of 20%.

• 
  Death and Madness

  If a target dies within 7 sec after being struck by Shadow Word: Death, generate 8 Insanity. When Shadow Word: Death fails to kill a target below 20% health, its cooldown is reset. Cannot occur more than once every 10 sec.

• 
  Mind Devourer

  Mind Blast has a 8% chance to make your next Shadow Word: Madness cost no Insanity and deal 20% additional damage.

• 
  Auspicious Spirits

  Your Shadowy Apparitions deal 15% increased damage and have a chance to generate 1 Insanity.