DecomposeSpell, AoE, Fire, Chaos, Duration Level: 1Consume a Corpse to create a cloud of flammable Poisonous gas. Any Burning effects or Detonator skills will explode the gas cloud, creating a fiery explosion.Poison Cloud Limit 6 Poison Clouds Poisons enemies as though dealing Chaos damage equal to 10% of Corpse's maximum Life Gains +20% more Radius per second, up to a maximum of +80% Cloud radius is 1.6 metres Cloud duration is 4 seconds
Explosion Critical Hit Chance:8.00% Cloud radius is 1.6 metres Cloud duration is 4 seconds Deals (11–352) to (17–529) Fire DamageSkills can be managed in the Skills Panel.
Acquisition Drop disabled Granted as an inherent skill from Acrid WandAcrid WandWandRequires Level 33Grants Skill: Level (9-20) Decompose and CorpsewadeCorpsewade Iron GreavesArmour: 47Requires Level 11, 17 StrGrants Skill: Level (4-20) Decompose10% increased Movement Speed (30-50)% increased Armour +(5-10) to Strength Trigger Decompose Skill on StepNatural decay can be twisted to dark ends..Metadata Item class: Skill Gem Metadata ID: Metadata/Items/Gems/SkillGemCorpseCloud
Decompose is a spell skill granted as the inherent weapon skill of an Acrid WandAcrid WandWandRequires Level 33Grants Skill: Level (9-20) Decompose, as well as by the unique item CorpsewadeCorpsewade Iron GreavesArmour: 47Requires Level 11, 17 StrGrants Skill: Level (4-20) Decompose10% increased Movement Speed (30-50)% increased Armour +(5-10) to Strength Trigger Decompose Skill on StepNatural decay can be twisted to dark ends. which triggers it on each step. This skill causes nearby corpses to release an expanding poison gas cloud that deals damage based on the corpse's maximum life. The gas clouds can be detonated with burning damage to create a fiery explosion.
The following support gems are recommendations by GGG as listed in-game, and do not necessarily reflect optimal combinations or the views of the wiki.
Gem tier
Support gems
I
CorrosionCorrosionSupport, Physical, Chaos Category: Corrosion Tier: 1 Cost & Reservation Multiplier: 110%Support Requirements: +5 DexSupports any skill that Hits enemies, causing Poison it applies to also Break enemy Armour. Cannot support skills that ConsumeFully BrokenArmour.Poison applied by supported Skills also BreaksArmour equal to 80% of Poison damagePlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
Prolonged Duration IProlonged Duration ISupport, Duration Category: Prolonged Duration Tier: 1 Cost & Reservation Multiplier: 120%Support Requirements: +5 StrSupports any skill that has a duration, making that duration longer.Supported Skills have 30% more Skill Effect DurationPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
Withering TouchWithering TouchSupport, Chaos, Duration Category: Withering Touch Tier: 1Support Requirements: +5 IntSupports any skill that Hits enemies, giving it a chance to Wither enemies on Hit.Withered lasts 4 seconds Supported Skills deal 25% less Damage Chance to inflict Withered on Hit with Supported Skills can exceed 100% Supported Skills have 1% chance to inflict Withered on Hit for every 0.57% of enemy Ailment Threshold dealt as Chaos damagePlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
II
Bounty IBounty ISupport Category: Bounty Tier: 2Support Requirements: +5 DexSupports any Skill that Hits Enemies, causing Enemies it kills to grant more Flask and Charm charges.Enemies killed by Hits from Supported Skills grant 50% more Charm charges Enemies killed by Hits from Supported Skills grant 50% more Life Flask Charges Enemies killed by Hits from Supported Skills grant 50% more Mana Flask ChargesPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
Bursting PlagueBursting PlagueSupport, AoE, Trigger, Physical, Chaos Category: Bursting Plague Tier: 2 Cost & Reservation Multiplier: 120%Support Requirements: +5 DexSupports skills that can Poison enemies, causing Poisoned enemies to gain Plague over time and explode in a Plague Burst on death. Cannot support the skills of Minions.Support Poison from Supported Skills also adds 100% of Damage per Second to Enemy as Plague, up to a maximum of 20% of Enemy's maximum Life
Plague Burst Cooldown Time:0.10s Triggered when an enemy Poisoned by a supported skill dies, dealing Physical damage around them based on the built-up Plague. +5% to Critical Hit Chance Deals Physical Damage equal to 100% of Plague on Triggering Enemy Has up to 100% more Area of Effect at maximum Plague Burst radius is 1.8 metresPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
Encroaching GroundEncroaching GroundSupport, AoE Category: Encroaching Ground Tier: 2 Cost & Reservation Multiplier: 110%Support Requirements: +5 IntSupports Skills that create Ground Surfaces, causing those Surfaces to grow over time, up to a limit.Ground Surfaces created by Supported Skills gain 20% increased Area of Effect per second, up to a maximum of 100%Place into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
III
Magnified Area IIMagnified Area IISupport, AoE Category: Increased Area of Effect Tier: 3 Cost & Reservation Multiplier: 130%Support Requirements: +5 IntSupports any skill with an area of effect, making it larger at the cost of damage.Supported Skills have 45% increased Area of Effect Supported Skills deal 10% less Area DamagePlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
Persistent Ground IIPersistent Ground IISupport Category: Persistent Ground Tier: 3Support Requirements: +5 StrSupports Skills which create Ground Surfaces, causing created Surfaces to last much longer and only end when their duration expires.50% increased duration of Ground Surfaces created by Supported Skills Ground Surfaces created by Supported Skills cannot be destroyed except by expiringPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
Prolonged Duration IIProlonged Duration IISupport, Duration Category: Prolonged Duration Tier: 3 Cost & Reservation Multiplier: 120%Support Requirements: +5 StrSupports any skill that has a duration, making that duration longer.Supported Skills have 35% more Skill Effect DurationPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
IV
Bounty IIBounty IISupport Category: Bounty Tier: 4Support Requirements: +5 DexSupports any Skill that Hits Enemies, causing Enemies it kills to grant more Flask and Charm charges.Enemies killed by Hits from Supported Skills grant 100% more Charm charges Enemies killed by Hits from Supported Skills grant 100% more Life Flask Charges Enemies killed by Hits from Supported Skills grant 100% more Mana Flask ChargesPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
Deadly Poison IIDeadly Poison IISupport, Chaos Category: Deadly Poison Tier: 4Support Requirements: +5 DexSupports any skill that Hits enemies, causing it to deal less damage but inflict more potent Poison.Supported Skills deal 30% less Damage with Hits 100% more Magnitude of Poison inflicted with Supported SkillsPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
V
Chaos MasteryChaos MasterySupport, Chaos Category: Mastery Tier: 5Support Requirements: +5 IntSupports Chaos skills, granting them an additional level. Does not support skills which do not have levels.+1 to Level of Supported Chaos SkillsPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
Persistent Ground IIIPersistent Ground IIISupport Category: Persistent Ground Tier: 5Support Requirements: +5 StrSupports Skills which create Ground Surfaces, causing created Surfaces to last much longer as well as lowering the Cooldown Recovery Speed of affected Enemies. Ground Surfaces from Supported Skills only end when their duration expires.50% increased duration of Ground Surfaces created by Supported Skills Ground Surfaces from Supported Skills apply Suppressive Ground Suppressive Ground inflicts 30% less Cooldown Recovery Rate Ground Surfaces created by Supported Skills cannot be destroyed except by expiringPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple Support Gems of the same Category socketed within one Skill.
Many Skills have had their base damage and/or damage growth per level rebalanced. Most of these changes are not specifically mentioned below as the changes are too widespread.
Decompose, the Skill granted by the Corpsewade Unique Boots, now causes the Poison Cloud to poison enemies as though dealing Chaos damage equal up to 10% of Corpse's Maximum Life at Gem levels 1-20 (previously 30-39.5%).
Gas Arrow, Gas Grenades and Decompose now have a limit of 6 Poison Clouds.
Skills with Expanding ground effects were unintentionally scaling radius over time instead of area of effect. They still scale the radius, though we have updated the descriptions and lowered the values on many of the affected skills:
The Poison Cloud on Gas Arrow, Gas Grenade and Decompose now gain 20% more Radius per second, up to a maximum of 80% (all previously 50%, up to a maximum of 200%).