View source for Area of effect

{{about|the game mechanic|the support gem|Increased Area of Effect Support}}
{{cleanup}}

'''Area of effect''' (often referred to as '''AoE''') refers to an '''area''' with radius in where all enemies can be affected by the '''effect'''. Skill gems with an area of effect have the [[:Category:AoE (gem tag)|AoE]] [[gem tag]].

==Mechanics==
The simplest examples are skills like {{il|Shock Nova}}, {{il|Ice Nova}} and {{il|Sweep}}, which have circular areas of effect. Skills like {{il|Cleave}} and {{il|Ground Slam}} have cone-shaped effects - effectively cut out of circles. Some skills have irregular shapes, for example {{il|Flame Surge}} or {{il|Glacial Cascade}}.

Skills that damage multiple enemies per cast do not necessarily have an area of effect. [[Pierce|Piercing]] [[projectile]]s like {{il|Ice Spear}} do not have the AoE tag, nor do [[chain]]ing skills. 

Modifiers that increase or decrease area of effect target the total area of the effect. When modifying the area, all applicable skills will be affected, including skills that do not deal damage such as [[aura]]s. Almost every [[passive skill]], [[support gem]], and [[item]] that modifies area of effect modifies the ''total area'', not the radius directly. Since the total area is being increased rather than the radius, the radius is effectively increased by the square root of the increase of area of effect for circular AoE abilities.  For example, applying +100% area of effect to an ability with a radius of 10 would increase the radius to 14.1.  For abilities with shapes other than a circle, the area is increased as usual for that shape.  For example, an ability that hits in a 120° cone would gain 3 times as much increase to radius from area of effect bonuses, due to only hitting a third of a circle.  

Some skills gain an increase to the radius of the area of effect as they are leveled.  Modifiers that are percentage increases to ''area of effect'' (ex. the quality bonus on [[Contagion]], granting +0% to +10% increase area of effect) are additive with other percentage radius modifiers.  Modifiers that annotate a specific (usually integer) increase to the ''radius'' (ex. the gem level bonus for [[Caustic Arrow]], granting +0 to +6 increased radius) are additive with the ''base'' radius, and apply before area of effect modifiers, making them substantially stronger.  These direct bonuses to radius are much rarer than increases to area of effect, however, and nearly always occur only as gem level bonuses on the active skill gems themselves.

For example, Caustic Arrow has a base radius of 13 and gains an additional +6 radius (total 19) by gem level 20.  This is a 46% increase to the base radius, equivalent to applying +113% area of effect to a level 1 Caustic Arrow, and is ''multiplicative'' with normal area of effect bonuses due to applying directly to the base radius.  A level 20 Caustic Arrow with +100% area of effect bonus would have a radius of 26.9, more than double the radius of an unbonused level 1 Caustic Arrow.

When an item or skill increases the area ''damage'', it will only be applicable to the part of the skill that deal damage in an area of effect. For example, with {{il|Fireball}}, that damage bonus will go into effect only when the projectile explodes on last target struck and won't work if the projectile [[pierce]]d, [[chain]]ed, or [[fork]]ed.  Many abilities that apply a [[damage over time]] effect in an area (ex. [[Contagion]], [[Bane]], [[Soulrend]]'s DoT effect, proliferated [[Ignite]], etc) do not benefit from area ''damage'', but may still benefit from increases to area of effect.  This is not universal, however; for example, [[Caustic Arrow]] and [[Toxic Rain]] both benefit from increases to area damage despite dealing damage over time (the difference may be that these two do not apply a damaging debuff, instead dealing damage based on a ground effect or world object).

Area of effect does not affect the trigger radius of [[trap]]s and [[mine]]s, but it can apply to effects cast by the trap or mine. Only passive skills and effects specifying "Trap Trigger Radius" or "Mine Detonation Radius" will affect them specifically. However, area of effect modifiers will apply to effects cast by the trap or mine. The same goes for [[totem]]s that use effects that have an area of effect as well.

Auras also benefit from general increases to area of effect, and additionally have access to bonuses that are specifically noted as increasing the area of effect of ''auras'' (ex. [[Leadership]] passive, [[Victario's Charity]]).  Nearly all auras also gain increased area of effect from their default [[quality]] bonus.

==Skill gems==
{| align="center"
|+ A list of non-aura or curse active skill gems with the gem tag [[:Category:AoE (gem tag)|AoE]] is displayed below.
|-
| style="vertical-align:top;" |{{Query skill gems
|where=
    skill_gems.strength_percent > 50
    AND items.class = "Active Skill Gems"
    AND skill_gems.gem_tags HOLDS "AoE"
    AND skill_gems.gem_tags HOLDS NOT "Aura"
    AND skill_gems.gem_tags HOLDS NOT "Curse"
|level=yes
|int=yes
|dex=yes
|radius=yes
|q_orderBy=skill_gems.primary_attribute, items.name
|q_limit=200
}}
| style="vertical-align:top;" | {{Query skill gems
|where=
    skill_gems.dexterity_percent > 50
    AND items.class = "Active Skill Gems"
    AND skill_gems.gem_tags HOLDS "AoE"
    AND skill_gems.gem_tags HOLDS NOT "Aura"
    AND skill_gems.gem_tags HOLDS NOT "Curse"
|level=yes
|int=yes
|dex=yes
|radius=yes
|q_orderBy=skill_gems.primary_attribute, items.name
|q_limit=200
}}
| style="vertical-align:top;" | {{Query skill gems
|where=
    skill_gems.intelligence_percent > 50
    AND items.class = "Active Skill Gems"
    AND skill_gems.gem_tags HOLDS "AoE"
    AND skill_gems.gem_tags HOLDS NOT "Aura"
    AND skill_gems.gem_tags HOLDS NOT "Curse"
|level=yes
|int=yes
|dex=yes
|radius=yes
|q_orderBy=skill_gems.primary_attribute, items.name
|q_limit=200
}}
|}

All [[:Category:Aura (gem tag)|Aura]] gems have an [[:Category:AoE (gem tag)|AoE]]:
{{Query skill gems
|where=
    skill_gems.gem_tags HOLDS "Aura"
    AND items.class = "Active Skill Gems"
|level=yes
|int=yes
|dex=yes
|radius=yes
|q_orderBy=skill_gems.primary_attribute, items.name
|q_limit=200
}}

All [[:Category:Curse (gem tag)|Curse]] gems also have an [[:Category:AoE (gem tag)|AoE]]:
{{Query skill gems
|where=
    skill_gems.gem_tags HOLDS "Curse"
    AND items.class = "Active Skill Gems"
|level=yes
|int=yes
|dex=yes
|radius=yes
|q_orderBy=skill_gems.primary_attribute, items.name
|q_limit=200
}}

A list of support [[gem]]s with the [[gem tag]]: [[:Category:AoE (gem tag)|AoE]] or quality that increases AoE
{{Query skill gems
|tables=skill_stats_per_level
|join=items._pageID=skill_stats_per_level._pageID
|where=
    items.class = "Support Skill Gems"
    AND (
         skill_gems.gem_tags HOLDS "AoE"
         OR skill_stats_per_level.id LIKE "%area_of_effect%"
    )
|level=yes
|int=yes
|dex=yes
|radius=yes
|q_orderBy=skill_gems.primary_attribute, items.name
|q_limit=200
}}

==Base items==
{{Query base items
|tables=item_stats
|join=items._pageID=item_stats._pageID
|where=
    item_stats.id LIKE "%area%"
    AND item_stats.id NOT LIKE "%map%"
    OR items.name="Greatwolf Talisman"
|level=1
|stat_column1_header=Area
|stat_column1_stat_format=add
|stat_column1_format=%s%%
|stat_column1_stat1_id=base_skill_area_of_effect_+%
}}

==Unique items==
The following [[unique item]]s are related to area of effect:
===Generic area of effect size===
{{Query unique items
|tables=item_stats
|join=items._pageID=item_stats._pageID
|where=item_stats.id="base_skill_area_of_effect_+%"
|level=1
|stat_column1_header=Area
|stat_column1_stat_format=add
|stat_column1_format=%s%%
|stat_column1_stat1_id=base_skill_area_of_effect_+%
}}

===Specific area of effect size===
{{Query unique items
|tables=item_stats
|join=items._pageID=item_stats._pageID
|where=
    item_stats.id LIKE "%_area_of_effect_+\%%"
    AND item_stats.id != "base_skill_area_of_effect_+%"
|large=1
|base_item=1
|level=1
|stat=1
}}

===Generic area of effect damage===
{{Query unique items
|tables=item_stats
|join=items._pageID=item_stats._pageID
|where=item_stats.id="area_damage_+%"
|level=1
|stat_column1_header=Damage
|stat_column1_stat_format=add
|stat_column1_format=%s%%
|stat_column1_stat1_id=area_damage_+%
}}

===Socketed gems supported by area gems===
{{Query unique items
|tables=item_stats
|join=items._pageID=item_stats._pageID
|where=
    item_stats.id LIKE "local_display_socketed_gems_%area%"
|level=1
|stat_column1_header=Inc. AoE
|stat_column1_stat_format=add
|stat_column1_stat1_id=local_display_socketed_gems_get_increased_area_level
|stat_column2_header=Conc. Effect
|stat_column2_stat_format=add
|stat_column2_stat1_id=local_display_socketed_gems_get_concentrated_area_level
}}

===Other area of effect stats===
{{Query unique items
|tables=item_stats
|join=items._pageID=item_stats._pageID
|where=
    item_stats.id LIKE "%area%"
    AND item_stats.id NOT LIKE "%_area_of_effect_+\%%"
    AND item_stats.id NOT LIKE "local_display_socketed_gems_%area%"
    AND item_stats.id != "area_damage_+%"
    
    AND item_stats.id != "glows_in_area_with_unique_fish"
    AND item_stats.id NOT LIKE "%area_contains%"
|large=1
|base_item=1
|level=1
|stat=1
}}

==Modifiers==
The following [[modifier]]s are related to area of effect:
===Regular===
{{Query spawnable modifiers
|where=
    mod_stats.id LIKE "%area%"
    AND mods.domain IN (1, 2, 10, 11, 14)
    AND mods.generation_type IN (1,2)
    AND spawn_weights.tag NOT LIKE "%shaper%"
    AND spawn_weights.tag NOT LIKE "%elder%"
|stat_text=1
|spawn_weights=1
|generation_type=1
}}

===Corrupted===
{{Query spawnable modifiers
|where=
    mod_stats.id LIKE "%area%"
    AND mods.domain IN (1, 2, 10, 11, 14)
    AND mods.generation_type = 5
|stat_text=1
|spawn_weights=1
}}

===Shaper===
{{Query spawnable modifiers
|where=
    mod_stats.id LIKE "%area%"
    AND mods.domain IN (1, 2, 10, 11, 14)
    AND mods.generation_type IN (1,2)
    AND spawn_weights.tag LIKE "%shaper%"
|stat_text=1
|spawn_weights=1
|generation_type=1
}}

===Elder===
{{Query spawnable modifiers
|where=
    mod_stats.id LIKE "%area%"
    AND mods.domain IN (1, 2, 10, 11, 14)
    AND mods.generation_type IN (1,2)
    AND spawn_weights.tag LIKE "%elder%"
|stat_text=1
|spawn_weights=1
|generation_type=1
}}

==Passive skills==
There are [[passive skill]]s that grant bonuses to skills with an area of effect.

===Area of effect===
These passive skills grant increased area of effect for skills.

{{Query base passive skills
|where=
  passive_skill_stats.id = "base_skill_area_of_effect_+%"
}}

===Area of effect for auras===
These passive skills grant increased area of effect for [[aura]]s.

{{Query base passive skills
|where=
  passive_skill_stats.id = "base_aura_area_of_effect_+%"
}}

===Area of effect for curses===
These passive skills grant increased area of effect for [[curse]]s.

{{Query base passive skills
|where=
  passive_skill_stats.id = "curse_area_of_effect_+%"
}}

===Area of effect damage===
These passive skills grant increased damage to area of effect skills.

{{Query base passive skills
|where=
  passive_skill_stats.id = "area_damage_+%"
}}

===Miscellaneous===
{{Query base passive skills
|where=
  passive_skill_stats.id LIKE "%area_of_effect%"
  AND passive_skill_stats.id NOT IN ("area_damage_+%", "base_skill_area_of_effect_+%", "base_aura_area_of_effect_+%", "curse_area_of_effect_+%")
}}

===Cluster Jewel passive skills===
The following [[Cluster Jewel]] [[passive skill]]s are related to area of effect:
{{Passive skill table
|q_where=passive_skills.id LIKE "affliction%"
     AND passive_skills.is_keystone = 0
     AND passive_skills.stat_text LIKE "%Area%"
|large=1
|stat_text=1
}}

===Keystone passive skills===
The following [[keystone passive skill]]s are related to area of effect:
{{Query keystone passive skills
|where=passive_skills.stat_text LIKE "%Area%"
}}

===Ascendancy passive skills===
The following [[Ascendancy passive skill]]s are related to area of effect:
{{Query ascendancy passive skills
|where=
  passive_skill_stats.id LIKE "%area_of_effect%"
}}

==Version history==
{{Version history table header}}
{{Version history table row|2.6.0}}
* In this update, we are removing the concept of "Increased Radius of Area Skills" and replacing it with "Increased Area of Effect" for all skills, items and passives. The broad impact of this change is that early increases to area of effect will be significant and impactful, while every subsequent point will be less and less noticeable. Previously, each point spent towards increasing the radius of area skills was better than the last, making accumulation of the stat far too desirable.
|}

==References==
{{reflist}}

[[Category:Game mechanics]]
[[Category:Keywords]]