Improved Voidform
Voidform increases your spell damage by an additonal 5% and grants 2 additional uses of Void Volley.
Tree position
In the Shadow Priest talent tree, Improved Voidform sits in the Shadow specialization talents, row 6 of 11. It is a single-point node. Its row opens once 8 points are spent in Shadow Talents.
Choice node
Improved Voidform shares its node with Ancient Madness. A character takes one of the two.
Ancient MadnessWhen Voidform ends, the haste lingers and decays over 10 sec.
Connected above
The tree draws a line into Improved Voidform from Voidform.
VoidformBombards your target with a Void Volley and twists your Shadowform with void magic, increasing your spell damage by 20% for 20 sec. During Voidform, Void Volley replaces this spell and can be used up to 3 times. Releases a volley of pure void energy, firing 10 bolts at your target and 1 boltsbolt at all enemies of your target for (95.4% of Spell Power) Shadow damage. Generates 10 Insanity.
Connected below
Improved Voidform leads on to Mind's Eye or Distorted Reality and Spectral Horrors.
Mind's EyeReduces the Insanity cost of Shadow Word: Madness by 5.
Distorted RealityIncreases the damage of Shadow Word: Madness by 20% and causes it to deal its damage over 12 sec, but increases its Insanity cost by 5.
Spectral HorrorsShadow Apparitions deal 30% increased damage to targets affected by your Shadow Word: Madness.
Same row
Also on this row: Shadowfiend, Dark Thoughts, Maddening Touch, Shadeburst, Dark Evangelism and Shattered Psyche.
ShadowfiendShadow Word: Death has a 40% chance to summon a Shadowfiend for 5 sec when damaging targets below 20% health. Summons a Shadowfiend to attack your target for 5 sec. Generates 1 Insanity each time the Shadowfiend attacks.
Dark ThoughtsIncreases the chance for Shadowy Insight to occur by 25%. When consuming Shadowy Insight, Mind Blast generates 1 additional Insanity.
Maddening TouchVampiric Touch deals 20% additional damage and has a chance to generate 1 Insanity each time it deals damage.

Dark EvangelismIncreases your periodic spell damage by 6%.
Shattered PsycheLasts 10 sec.
Talent trees
Improved Voidform is in the talent tree of 3 specializations. Priest: Discipline (Healer), Holy (Healer), Shadow (DPS).
Improved Voidform Changes by patch
Tracked changes to this talent between game data builds, newest first.
- First tracked in the game data (patch 12.1.0)
Background
Art © Blizzard Entertainment. Fan reference, not affiliated.