Aura (Age of Empires IV)

This article is about the mechanic in Age of Empires IV. For the mechanic in other games of the series, see Aura.

An Aura in Age of Empires IV is a property of various abilities of certain units and buildings, granting their effects across a circular area.

Overview

Aura abilities, instead of simply affecting or directly modifying a single unit, affect units within a certain radius (aura) from the unit or building with the ability, or gain a boost depending on the amount of units within the aura. Aura abilities can be active, passive, or hybrid and they can affect allied or enemy units. Auras are always circular and are defined by their radius from the center of the unit or building model. For buildings, this means the effective area of the aura is smaller than the full circle, because part of the aura gets covered by the building's footprint.

Influences are similar to auras in that they effect or are effected by units within a specific area. However, influences are tile based, not radius based, and they can be extended into irregular, non-rectangular shapes through other buildings within the influence zone. They are covered separately.

Passive enhancements

These aura abilities positively enhance allied units within the aura.

Ability	Effect	Radius	Unit/Building	Requirement
Abbey Healing	All out-of-combat allied units heal for 6 HP/sec.	7.5	Abbey of Kings
Angevin Durability	Heavy Spearmen +20% health and damage	7	Fortress	Angevin Empire
Attack Drums	Allied units +15% attack speed.	6	Mehter
Camel Support	Allied infantry +2/+2 armor.	5	Camel Archer Camel Rider	Camel Support
Campfire	+30% Line of Sight.	5	Campfire
Coastal Navigation	Ships +15% move speed.	7.5	Dock	Malians
Construct the Kingdom	Villagers construct 33% faster.	4	Jeanne d'Arc	Level 2
Desert Outposts	Ranged units +15% range. Upgrade: All units +1 melee/ranged armor	7	Fortress	Upgrade: Desert Citadels
Emperor's Guard	Varangian Guards +3/+3 armor.	8	Wonder	Byzantines
Extra Materials	Walls are repaired for 20 HP/sec.	4	Outpost Stone Wall Tower Keep Barbican of the Sun Great Wall Gatehouse	Extra Materials
Faith of Castile	Nearby units +20% damage, +1 hp/s regeneration	7.5	Sacred Site	Kingdom of Castile
Farima Leadership	Infantry units +15% movement speed.	5	Sofa	Farima Leadership
Galvanize The Righteous	Jeanne's Companions gain +1/+1 armor, +10% damage.	4	Jeanne d'Arc	Level 3
Grand Fulani Corral Aura	Cattle generate +20 food per minute.	6.5	Grand Fulani Corral
Healing Aura	Out-of-combat allied units regenerate at 4 HP/sec.	5	Mosque Dome of the Faith	Tranquil Venue
High Armory Production Bonus	Siege engines cost -20% from nearby Siege Workshops.	7.5	High Armory
Huntress' Stealth	All infantry units enter stealth mode. Lingers for 30 seconds outside of radius.	8	Fort of the Huntress
Khan's Hunter Range Aura	Ranged units +0.5/+0.75/+1 range per Age. Ranged cavalry additional +0.5 range.	4	Khan's Hunter
Kingly Presence	Heals all allied out-of-combat units for 2 HP/sec.	5	King
Improved Torch	Allied units +25% torch damage.	4	Scout	Trapezites
Infantry Support	Allied camel units +3/+3 armor.	5	Infantry	Infantry Support
Irrigated	Villagers +10%/+14%/+18%/+22%/+26% gathering rate per water level.	9.5	Cistern Cistern of the First Hill
Irrigated Field	Villagers +10% gather rate from farm Stackable for up to +30%.	7.5	Granary
Istanbul Imperial Palace Aura	Buildings generate 2x Vizier XP.	12	Istanbul Imperial Palace
Katana Bannerman Aura	Melee Infantry + 15% damage. Lasts for 30 seconds after death.	6	Katana Bannerman
Kurultai Aura	Allied units + 20% damage. Allied units heal +1 HP/sec.	10	Kurultai
Lord of Lancaster Inspiration	Units +5% health for each Lord	5	Lord of Lancaster
Mass Inspire	Holy Roman Empire: Villagers +40% gather speed for 30 seconds Can upgrade to +50% gather speed and +25% build speed. Order of the Dragon: Villagers +15% gather rate	6.5 (HRE) 7.5 (OotD)	Aachen Chapel	HRE Only Basic: Garrisoned Prelate Upgrade: Devoutness
Medical Centers	Allied units heal +2 HP/sec.	5	Keep Town Center	Medical Centers
Melee Defense Drums	Allied units +2 melee, +2 fire armor.	6	Mehter
Mehter Speed Bonus	Allied units in formation +15% move speed.	In formation	Mehter	Mehter Drums
Network of Castles	Allied units +20% attack speed. Can upgrade to +30%.	12.5	Berkshire Palace Keep King's Palace Outpost Stone Wall Tower Town Center The White Tower	Upgrade: Network of Citadels
Ranged Defense Drums	Allied units +2 ranged armor.	6	Mehter
Saint's Blessing	Allied units +2 damage, +1/+1 armor for 10 seconds. Can upgrade damage to +3, duration to 20 seconds.	2 Can upgrade to 7	Warrior Monk	Basic: Warrior Monk must attack a unit. Duration upgrade: Divine Light Damage/range upgrade: Fervor
Synergistic Crops	Villagers +60% Olive Oil gather rate. Lingers for 20 seconds out of aura.	6.25	Grand Winery
Taxation Aura	Passing Traders and Trade Ships generate gold. Can upgrade to generate food.	10	Toll Outpost Saharan Trade Network	Food Upgrade: Saharan Trade Network
The Long Wall	Ranged units +25% damage.	On Wall	Stone Wall	Great Wall Gatehouse
Trade Protection	Traders +30% move speed, +8/+8 armor. Lingers for 15 seconds.	15	Keep Sea Gate Castle	Sea Gate Castle
Treasure Towers	Sacred Sites, Monasteries, Pilgrims +20% gold generation	7.5	Fortress	Treasure Towers
Uma Bannerman Aura	Cavalry + 15% damage. Lasts for 30 seconds after death.	6	Uma Bannerman
Wall Defense	Reduce ranged damage taken by 25%, siege damage by 50%. Ranged units +2 range.	On Wall	Stone Wall
Yam	Cavalry and Traders +15% move speed. Can upgrade to affect all non-siege units. Can upgrade to heal Traders at 0.5 HP/sec.	6	Outpost	Basic: Mongols Upgrade: Deer Stones or Yam Network Heal upgrade: Yam Network (Improved)
Yumi Bannerman Aura	Ranged Infantry + 15% damage. Lasts for 30 seconds after death.	6	Yumi Bannerman

The Grand Fulani Corral enhancement does not have its own icon or name. The orchard bonus for the Abbasid Dynasty, Ayyubids, and Delhi Sultanate can also be considered to be a passive enhancement bonus, where the enhancement applies to resources instead of units, that does not have a specific name or icon.

Passive debuffs

These aura abilities negatively affect (debuff) enemy units within the aura.

Ability	Effect	Radius	Unit/Building	Requirement
Camel Unease	Enemy horse cavalry -20% damage.	5	Atabeg Camel Archer Camel Lancer Camel Rider Dervish Desert Raider
Five Mountain Ministries	Applies Sohei's Sutra every 6 seconds to enemy unit.	10	Buddhist Temple Temple of Equality	Five Mountain Ministries
Teutonic Wrath	Enemy units -2 melee/ranged armor	3	Teutonic Knight

Passive boosts

These aura abilities affect only a single unit, are boosted by other units within the aura.

Ability	Effect	Radius	Unit/Building	Requirement
Knightly Brotherhood	+1 max health per heavy cavalry	5	Chevalier Confrere
Rule of Templars	Charge damage +2 per heavy cavalry	5	Templar Brother

Active aura abilities

These abilities are active abilities, that is, they require activation by the player. They affect either allied or enemy units within the aura.

Ability	Effect	Radius	Unit/Building	Requirement
Akritoi Defense	Villagers gain +2/+2 armor and +1/2/3/5 damage per Age for 30 seconds.	9.5	Cistern Cistern of the First Hill
Attack Speed Arrow	+50% attack speed to to units (except siege) for 5 seconds. Can upgrade duration to up to 12 seconds, range up to 11.75 tiles.	8.75 11.75	Khan	Basic: Feudal Age Upgrade: Whistling Arrows
Buddhist Conversion	Attempts to mass convert enemy units. Allied units gain +20% damage.	4.75	Buddhist Monk	Carried Relic
Conversion	Attempts to mass convert enemy units.	4.75	Dervish Monk Prelate Scholar Shaolin Monk Shinto Priest Warrior Monk	Carried Relic
Defense Arrow	+2/+2 armor to units for 5 seconds. Can upgrade duration to up to 12 seconds, range up to 11.75 tiles.	8.75 11.75	Khan	Basic: Castle Age Upgrade: Whistling Arrows
Divine Restoration	All allied units are instantly healed for 30% of their missing HP.	4	Jeanne d'Arc	Level 2
Holy Wrath	Deal 20 damage to all enemies. Can stack up to 4 uses which take 60 seconds to recharge.	1.25	Jeanne d'Arc	Level 2 - Path of the Warrior
Maneuver Arrow	+33% move speed to units (except Villagers) for 5 seconds. Can upgrade duration to up to 12 seconds, range up to 11.75 tiles.	8.75 11.75	Khan	Upgrade: Whistling Arrows
Mass Heal	Heals all units at 2 HP/sec for 10 seconds. Heals 50% faster while carrying Relic. Can upgrade healing rate by +25% or +30%.	3 tiles	Dervish	+25% Heal Rate: Logistics +30% Heal Rate: / Logistics 0s Cooldown Logistics
Nehan Conversion	Attempts to mass convert enemy units within 4.75 tiles. Allied units within 4.75 tiles +20% damage, +25% move speed.	90 sec	Buddhist Monk	Carried Relic Nehan
Valorous Inspiration	+35% attack speed to units within 4 tiles for 20 seconds.	90 sec	Jeanne d'Arc	Level 4 - Gunpowder Monarch

Trivia

• If a Samurai Bannerman is killed, their aura remains on the map as a selectable object with the same effect for 30 seconds. This is the only case in the series where an ability appears as a distinct entity from its original source.

See also

• Influence (Age of Empires IV), a sub-class of Aura.
• Ability (Age of Empires IV), for other abilities in Age of Empires IV.

Gameplay elements in the Age of Empires series
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