Buff

Buff is a gameplay element in Fire Emblem Heroes that boosts a character's stats under certain conditions.

Types of Buffs
A buff is granted by certain skills which can be divided into two types based on their activation criterias: Field Buff and Combat Buff.

Field Buffs
Field Buffs are visible stat changes highlighted in blue. They are usually activated at start of a turn or after a unit's combat. These buffs do not stack together, only the highest value will be applied to an affected stat. They do, however, stack with Debuffs and Combat Buffs.

{|width="100%" class="mw-collapsible"
 * List of skills with Field Buff effect:
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Weapons

 * Ardent Service
 * Aura
 * Blessed Bouquet
 * Býleistr
 * Cupid Arrow
 * Cymbeline
 * Dark Aura
 * First Bite
 * Fresh Bouquet
 * Fólkvangr
 * Grima's Truth
 * Hliðskjálf
 * Iris's Tome
 * Joyous Lantern
 * Light Breath
 * Naga's Tear
 * Peshkatz
 * Rogue Dagger
 * Sieglinde
 * Siegmund
 * Skuld
 * Tactical Bolt
 * Tactical Gale
 * Urðr

Assists

 * Earthfire Balm
 * Earthwater Balm
 * Fireflood Balm
 * Harsh Command
 * Kindled-Fire Balm
 * Prayer Wheel
 * Rally Attack Defense
 * Rally Attack Resistance
 * Rally Attack Speed
 * Rally Attack
 * Rally Defense Resistance
 * Rally Defenseense
 * Rally Resistanceistance
 * Rally Speed Defense
 * Rally Speed Resistance
 * Rally Speed
 * Rally Up Atk
 * Rally Up Resistance
 * Solid-Earth Balm
 * Still-Water Balm
 * Swift-Winds Balm
 * Windfire Balm



Passives

 * Attack Defense Link
 * Attack Opening
 * Attack Resistance Link
 * Attack Speed Link
 * Attack Tactic
 * Blaze Dance
 * Def Opening
 * Defense Resistance Link
 * Defense Tactic
 * Defiant Attack
 * Defiant Defense
 * Defiant Resistance
 * Defiant Speed
 * Deluge Dance
 * Earth Dance
 * Even Attack Wave
 * Even Defense Wave
 * Even Resistance Wave
 * Even Speed Wave
 * Fireflood Dance
 * Firestorm Dance
 * Fortify Armor
 * Fortify Beasts
 * Fortify Cavalry
 * Fortify Defense
 * Fortify Dragons
 * Fortify Fliers
 * Fortify Resistance
 * Gale Dance
 * Geyser Dance
 * Hone Armor
 * Hone Attack
 * Hone Beasts
 * Hone Cavalry
 * Hone Dragons
 * Hone Fliers
 * Hone Speed
 * Human Virtue
 * Joint Hone Speed
 * Odd Attack Wave
 * Odd Defense Wave
 * Odd Resistance Wave
 * Odd Speed Wave
 * Resistance Opening
 * Resistance Tactic
 * Rockslide Dance
 * Speed Def Link
 * Speed Opening
 * Speed Resistance Link
 * Speed Tactic
 * Torrent Dance
 * }

Combat Buffs
Unlike Field Buffs, Combat Buffs are not visible but they instead can be observed in the Combat forecast to evaluate the outcome of the battle. They are only activated during combat. These buffs stack together with no upper limit, along with Field Buffs and Debuffs if any. However, these buffs are not affected by Field Debuffs such as Panic Ploy, Beorc's Blessing etc.

{|width="100%" class="mw-collapsible"
 * List of skills with Combat Buff effect:
 * -valign=top
 * -valign=top

Passives

 * }