Vaal skill
Vaal skills are granted by Vaal skill gems, a special type of corrupt skill gem that can be used to unleash powerful abilities fueled by the souls of slain enemies.
Vaal skill gems can be looted from corrupted areas, certain strongboxes, and bosses of corrupted maps. It is also possible to create a Vaal skill gem by using a 
Vaal OrbVaal OrbStack Size: 20Corrupts an item, modifying it unpredictablyRight click this item then left click an item to corrupt it. Corrupted items cannot be modified again.
on a corresponding normal skill gem (e.g. using a Vaal Orb on Module Error: Too many skills found with q_where = skill.active_skill_name="Spectral Throw". Please choose only one of the following ids:
ThrownWeaponRoyale - N/A (page)
ThrownWeapon - N/A (page) has a chance of turning it into Module Error: Too many skills found with q_where = skill.active_skill_name="Vaal Spectral Throw". Please choose only one of the following ids:
ExileVaalThrownWeapon3 - Deals 30% less Damage, Fires 4 Projectiles in each of two mirrored spirals (page)
ExileVaalThrownWeapon2 - Deals 30% less Damage, Fires 5 Projectiles in each of two mirrored spirals (page)).
Mechanics
To use a Vaal skill, its gem must first be charged by collecting souls. Each slain enemy provides one soul, assigned randomly to one of the character's equipped Vaal skill gems. Souls will never be assigned to Vaal skill gems in the character's secondary weapon set. Collected souls cannot be transferred between zone instances; instead, each instance maintains its own soul counter for each gem. In other words, entering a new instance will start a new counter for each gem, but returning to a previously visited instance will restore each counter to its previous value.
Once a Vaal skill gem collects a sufficient number of souls, it is charged with one use. The number of souls per use depends on the skill and increases with difficulty. Some Vaal skill gems can store enough souls for more than one use. Once a gem's maximum soul capacity is reached, it can collect no additional souls until they are spent by using the skill.
Because a 
Gemcutter's PrismGemcutter's PrismStack Size: 20Improves the quality of a gemRight click this item then left click a gem to apply it. The maximum quality is 20%.
can't be used on corrupted gems, getting quality on vaal gems is substantially harder than it is on a regular gem. Vaal gems must either drop with quality or a normal gem already with quality must have a Vaal OrbVaal OrbStack Size: 20Corrupts an item, modifying it unpredictablyRight click this item then left click an item to corrupt it. Corrupted items cannot be modified again. used on it and be turned into a corrupted Vaal gem.
Vaal skills themselves can not be activated by trigger gems, they can trigger other gems however.
List of Vaal skill gems
Sorted By Attribute
Vaal Skills have requirements based on each of the three main attributes, and can be easily identified by the attribute colour.
List of active skill gems granting vaal skills
The skill Gluttony of Elements, which is obtained by equipping 
Blood of CorruptionBlood of Corruption
Amber AmuletRequires Level 5+(20-30) to StrengthGrants Level 10 Gluttony of Elements Skill
Adds 19 to 43 Chaos Damage to Attacks
-(10-5)% to all Elemental Resistances
+(17-29)% to Chaos ResistanceCorruptedIn my dream, a voice spoke to me. It said:
'My reach knows no bounds.
All that is pure is destined to rot.
All that lives is destined to serve.'
- Doryani, Queen's Thaumaturgist
, also counts as a Vaal skill.
Unique items
Equipment
The following unique gloves affect the player's Vaal skills: Lua error in Module:Item_table at line 1971: bad argument #2 to 'format' (string expected, got nil).
Jewels
There are also unique jewels that exclusively affect the player's Vaal skills:
Lua error in Module:Item_table at line 1971: bad argument #2 to 'format' (string expected, got nil).
Achievements
The following achievements are related to Vaal skill gems:
| Name | Description |
|---|---|
Virtue Corruption  |
Corrupt a skill gem into a Vaal skill gem. |
Vaal Gemling  |
Have a Vaal Skill Gem reach level 20. |
Lore
The Vaal civilization may have existed thousands of years ago, but it had its own form of Skill Gems. Brutally powerful and fueled by the sacrifice of foes, these gems are the ultimate version of many contemporary Path of Exile skills. Vaal Skill Gems charge up as you kill enemies and can be unleashed for a devastating effect.
Version history
| Version | Changes |
|---|---|
| 1.2.1 |
|