Area of effect

Certain skills have an Area of Effect (AoE for short), which is a circular area of effect. These skills contain the AoE keyword. The simplest examples are Shock Nova, Ice Nova and Sweep.

Skills like Cleave and Ground Slam that have effects that are in a cone are effectively cut outs of circles.

Ice Spear is not an Area of Effect skill, it is a Projectile that deals damage on impact. How large the projectile is determines the hit, and is not affected by Area of Effect.

However, Fireball is also a Projectile spell. Upon impact, Fireball deals a small Area of Effect (explosion) around the impact point.

Shock Nova has two Area of Effect values, one for the inner ring and one for the outer ring.

When using a Passive or Support increase on the radius, all radius values in the skill will be modified, even if the skill does not do damage. The passives that are more specific (increase radius of Aura) will only apply to that specific group.

When a Passive or Support increases the area damage, it will only be applicable to skills that deal damage on that Area of Effect. For example, with Fireball, that damage bonus will go into effect only when the projectile explodes on last target struck and won't kick if the projectile pierced, chained or forked.

Area of Effect does not affect the trigger radius of Traps and Mines, but it can apply to effects cast by the trap or mine. Fire Trap, for example, has an area of effect, and is affected by it. Bear Trap does not, and is not. If supporting a spell with the support gem, then it will be affected if it's a spell that has an area of effect.

Same goes for Totems. If the effect the totem uses has an area of effect, it will get the bonus from the passive.

Area of Effect Skills

There are currently 25 Area of Effect skills aside from auras, curses, and totems.

Description
	Deals damage with all equipped weapons to enemies in a 180 degree arc in front of the player. When dual wielding, equipment requirement applies to both weapons, and each weapon does reduced damage. As the skill levels up, damage increases. Requires an axe, sword, two-handed axe, or two-handed sword.
	Taunts all nearby enemies to attack the player. Endurance charges are added proportional to the number of surrounding enemies. As the skill levels up, number of endurance charges added increases. Higher quality Enduring Cry gems add more endurance charges.
	Damages and stuns all enemies in a 90 degree arc in front of the player. As the skill levels up, damage increases. Requires a mace, two-handed mace, or staff.
Infernal Blow	Deals damage to an enemy, with some physical damage converted to fire damage. If the enemy dies soon after being hit, they will explode, dealing fire damage to nearby enemies. As the skill levels up, damage increases. Higher quality Infernal Blow gems have increased Area of Effect radius. Requires an axe, mace, sword, two-handed axe, two-handed mace, two-handed sword, staff, or unarmed
	The player leaps through the air, damaging enemies where they land. Some enemies are knocked backwards. As the skill levels up, damage increases. Higher quality Leap Slam gems cause enemies to be stunned for longer. Requires an axe, mace, sword, two-handed axe, two-handed mace, two-handed sword, or staff.
	Summons fiery elemental shields providing additional armour for a short duration. If cumulative damage prevented by your blocking or armour reaches a threshold, the shields explode outwards, dealing fire damage to surrounding enemies.
	Deals damage to enemies in a 300 degree arc in front of and around the player, and knocks some of them back. As the skill levels up, damage increases. Higher quality Sweep gems knock enemies back further. Requires a two-handed axe, two-handed mace, or staff.
	Explodes an unused corpse, dealing fire and physical damage to nearby enemies.
	Fires an arrow which inflicts a short duration fuse charge on the enemy. Applying additional charges extends the duration. When the target dies or the fuses expire, the charges explode, dealing fire splash damage to nearby enemies. The splash distance is proportional to the number of charges upon death. Explosive charges can be increased up to five. Attempting to apply any more than five charges will reset the fuse timer without adding additional charges.
	Throws a trap that explodes when triggered, leaving an area of burning ground that damages enemies who walk through it.
	Lays a remote mine that you can detonate to freeze all enemies in the area.
Ice Shot	Fires an arrow that chills its target and creates a patch of ground ice.
	Fires a charged arrow at the target, causing them to be struck by a bolt of lightning which damages up to 3 nearby enemies.
	Fires an arrow which explodes in a cloud of poison. Enemies who enter the cloud are poisoned for a short time, taking chaos damage. Your arrows themselves also add additional chaos damage.
	Fires a large number of arrows into the air, to land at the target after a short delay.
	Attacks a small area in front of you. Each consecutive Reave that hits an enemy increases the area of effect.
	Fires a frozen Projectile that leaves a trail of ground ice beneath it. It explodes on impact, creating more ground ice and damaging targets within an area.
	Ice crystals protrude from the ground at target location. Monsters in this area take damage and become frozen. This spell can deliver Area of Effect cold damage to any place within line of sight. It has no maximum range.
Discharge	Discharge all the character’s charges to deal elemental damage to all nearby monsters. All damage from expended charges is dealt simultaneously within a radius centered around the caster.
	Unleashes a burning ball of fire towards a target which explodes, damaging nearby foes.
	Flaming bolts rain down over the targeted area. They explode when landing, dealing damage to nearby enemies.
	A chilling circle of ice expands from the caster.
	Casts a delayed teleport to a target destination. When the teleport occurs, lightning damage is dealt to the area around both where the player was and where they teleported to.
	Ignites you with magical fire that rapidly burns you and nearby enemies. Your spell damage is substantially increased while under this effect. The effect ends when you have 1 life remaining.
	Casts a shocking ring of lightning which deals damage to monsters it touches. Monsters in the centre of the ring receive no damage.
	Sets a marker at the target location, after a short duration lightning strikes the marker, dealing damage around it, when this happens it will also set off the lightning at any other marker you've cast.

These totem Skills may or may not use Area of Effect passives

Totem Skill	Description
Decoy Totem	Summons a totem that taunts nearby monsters to attack it.
	Summons a totem that can consume nearby corpses. If you are hurt, it will destroy a corpse to leech life to you.
	Summons a totem that has an aura which regenerates life for you and your nearby allies.
	Summons a totem that shakes the earth around it, knocking back and damaging nearby enemies

There are currently 13 aura skills:

Skill	Description	Mana Reserve	Level
Anger	Casts an aura that adds fire damage to the attacks of you and your allies.	60%	10
	Casts an aura that grants armour to you and your allies.	60%	31
Vitality	Casts an aura that grants health regeneration to you and your allies.	40%	24
Grace	Casts an aura that grants evasion to you and your allies.	60%	31
Haste	Casts an aura that increases the attack speed and cast speed of you and your allies.	60%	31
Hatred	Casts an aura that adds cold damage to the skills (spells and attacks) of you and your allies.	60%	10
	Casts an aura that grants mana regeneration to you and your allies.	60-440	10
Discipline	Casts an aura that grants energy shield to you and your allies.	60%	31
Wrath	Casts an aura that adds lightning damage to the attacks of you and your allies.	60%	10
Purity of Elements	Casts an aura that grants elemental resistances to you and your allies.	40%	31
Purity of Fire	Casts an aura that grants fire elemental resistances to you and your allies.	40%	31
Purity of Ice	Casts an aura that grants ice elemental resistance to you and your allies.	40%	31
Purity of Lightning	Casts an aura that grants lightning elemental resistances to you and your allies.	40%	31

There are currently 11 Curse skills:

Skill	Description
	Curses all targets in an area. Attacks on the cursed targets will leech life and mana, and killing them will result in more flask charges and a chance to gain an endurance charge.
	Curses all targets in an area, making them less resistant to cold damage and giving cold damage a chance to freeze.
	Curses all targets in an area, making them easier for projectiles to pierce and easier to knock back, while reducing their evasion against projectiles.
Temporal Chains	Curses all targets in an area, making time pass more slowly for them. They will move, attack and cast at a reduced speed, and effects on them will expire more slowly.
Conductivity	Curses all targets in an area, making them less resistant to lightning damage and giving lightning damage a chance to shock.
	Curses all targets in an area, making them more vulnerable to critical strikes.
	Curses all targets in an area, making them less resistant to elemental damage.
Enfeeble	Curses all targets in an area, making their attacks less effective.
Flammability	Curses all targets in an area, making them less resistant to fire damage and giving fire damage a chance to burn.
	Curses all targets in an area, making them take increased damage from physical attacks and degeneration, and easier to stun. The target's energy shield will regenerate more slowly.
Punishment	Curses all targets in an area, causing them to suffer some of the physical damage they deal with their attacks. This curse was once removed for a long time, and reintroduced new balanced with patch 0.10.0.

Base Radius of all Skills

As of October 2013 when Mark_GGG decided to spill the beans before going on holidays, and searching the skill feedback forums. So information is missing on skills such as Reave and Flameblast.

Skill or weapon	value
Auras	36
	7 (explosion), 14 (Ice placement)
	20
	16
Curses	16
	2 (player radius) + 4~7 (range of weapon)
Decoy Totem	?? (presumable same as enduring cry?
	16
Discharge	30
	60
	15
	15
	8 (explosion)
	25 (ares in which fireballs drop, upped in 1.0.4), 8 (explosion)
Flameblast	??
	??
	35 (90 degree cone)
	30
Ice Shot	?? (cone), ?? (ice placement)
Infernal Blow	15 (death explosion)
	15
	16 (seeking radius for extra targets)
	16
	12 (around target?)
	15
	20 (cloud)
	??
	18
	?? (presumably same as auras)
	10
	26 (outer), 14(inner dead-zone)
	??
	20
	??
	20
	?? (presumably attacks at weapon range like

Passives

There are passive skill nodes that grant bonuses to skills that have an area of effect.

Radius of area skills

These passives increase the radius of all skills with an area of effect.

Area of Effect

Passive Skill

(4-7)% increased Area of Effect [1]

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10% increased Area of Effect [1] [2] [3] [4] [5]

---

12% increased Area of Effect [1] [2]

Area of Effect Radius is a small passive skill that grants increased area of effect for skills.

Version history

Version	Changes
2.6.0	All of the increased area of effect bonuses on the tree on all non-notable passive skills now grant 8% (up from 5%).
2.1.0	Changed from 4% increased Radius of Area Skills to 5%.
1.2.0	The Witch and Shadow passive tree starting area has been redesigned.

Blast Radius

Notable Passive Skill

10% increased Area of Effect
20% increased Area Damage [1]

Blast Radius is a notable passive skill that grants increased area of effect and increased area damage.

Anointment

Blight anointment to unlock the passive:

Oil #1	Oil #2	Oil #3	Outcome
Clear Oil	Verdant Oil	Opalescent Oil	Blast Radius	10% increased Area of Effect 20% increased Area Damage

Version history

Version	Changes
2.6.0	Blast Radius now grants 10% increased area of effect.
2.1.0	Changed from 12% increased Radius of Area Skills and 8% increased Area Damage to 5% increased Radius of Area Skills and 20% increased Area Damage.
1.2.0	The Witch and Shadow passive tree starting area has been redesigned.

Amplify

Notable Passive Skill

10% increased Area of Effect
20% increased Area Damage [1]

Amplify is a notable passive skill that grants increased area of effect for skills. It also grants increased damage for any area of effect component of skills that deal damage.

Anointment

Blight anointment to unlock the passive:

Oil #1	Oil #2	Oil #3	Outcome
Amber Oil	Azure Oil	Opalescent Oil	Amplify	10% increased Area of Effect 20% increased Area Damage

Version history

Version	Changes
2.6.0	Amplify now grants 10% increased area of effect.
2.1.0	Changed from 12% increased Radius of Area Skills and 8% increased Area Damage to 5% increased Radius of Area Skills and 20% increased Area Damage.

Radius of auras

These passives increase the radius of auras.

Aura Area of Effect

Passive Skill

12% increased Area of Effect of Aura Skills [1] [2] [3] [4]

Aura Area of Effect is a small passive skill that grants increased area of effect for auras.

Version history

Version	Changes
2.6.0	All of the increased aura area of effect bonuses on the tree on all non-notable passive skills now grant 20% (up from 12%).
1.3.0	The Templar, Marauder, and Duelist starting areas have been reworked significantly.

Leadership

Notable Passive Skill

30% increased Area of Effect of Aura Skills
6% increased effect of Non-Curse Auras from your Skills [1]

Leadership is a notable passive skill that grants increased area of effect for auras and increased effect magnitude of auras you cast.

Anointment

Blight anointment to unlock the passive:

Oil #1	Oil #2	Oil #3	Outcome
Violet Oil	Opalescent Oil	Silver Oil	Leadership	30% increased Area of Effect of Aura Skills 6% increased effect of Non-Curse Auras from your Skills

Version history

Version	Changes
2.6.0	Leadership now grants 50% increased aura area of effect.
2.0.0	Also provides 6% increased effect of Non-Curse Auras you Cast.

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Items that affect Area of Effect

These items modify Area of Effect

A list of some of the Radius sizes

Radius size according to Mark 2013-10-31 Mark in response to Lightning Arrow enquiry Mark in Melee splash feedback