SP:
500
CD:
5

Resolve combat as if foe suffered Def/Res-50%.

Unit recovers HP=half damage dealt.

Inheritable Restrictions?

No Staff

Skillsets that use skill

Daughter of Dragons (Distant Counter Enemy Phase)

Titan of Tellius (Mixed Phase Generalist)

Divine Knight of Daein (Enemy Phase Defense)

Giant Fluffy Cockroach Nugget (Enemy Phase / Wall)

Winter Chicken Run (Mixed Phase)

Aurora Execution (Defensive Tank)

In the White Light (Defensive Tank)

Blazing Blade Barrage! (Pseudo Special Fighter)

On the Path of Radiance! (Defensive Nuke)

Diamond Dust (Generalist)

Recommended
Sagittae A Close Counter
Alternate: Fort. Def/Res 3
Reposition B Chill Spd 3
Aether
Alternate: Bonfire
C Res Smoke 3
Alternate: Atk Smoke 3
SP2025SClose Def 3

Smashin' Pumpkins (Brave Bold)

Hocus Pocus

Recommended
Spirit Breath A Distant Counter
Alternate: Death Blow 4
Pivot
Alternate: Swap
B Special Fighter 3
Aether
Alternate: Ignis
C Odd Atk Wave 3
Alternate: Armor March 3
SP2145SQuick Riposte 3

Friday the 13th (Budget)

Wolf in Devil’s Clothing (Defensive)

Exalted Hero (Special Fighter Build)

Supreme Chad of Múspell (Physical Tank)

Seek And Destroy (Player Phase)

Recommended
Garm A Death Blow 4
Alternate: Distant Counter
Pivot
Alternate: Swap
B Special Fighter 3
Aether
Alternate: Dragon Fang
C Odd Atk Wave 3
Alternate: Armor March 3
SP2025SArmored Boots

Until It Sleeps (Enemy Phase)

Garm A Distant Counter
Alternate: Close Def 3
Pivot
Alternate: Swap
B Special Fighter 3
Aether
Alternate: Ignis
C Armor March 3
Alternate: Def Ploy 3
SP1905SClose Def 3

The Absolutest of Units (Defensive)

Recommended
Basilikos (+Def)
Alternate: Basilikos (+Eff)
A Steady Breath
Alternate: Steady Stance 3
Reposition B Guard 3
Alternate: Quick Riposte 3
Aether
Alternate: Sol
C Drive Def 2
Alternate: Panic Ploy 3
SP2275SQuick Riposte 3
Alternate: Close Def 3

Bloody Stream (Enemy Phase Bruiser)

I’ll Protect You, Mama! (Enemy Phase)

Papa's Little Girl (Speed-invested Bruiser)

Play With Me! (Defensive Tank)

Reckless Inferno (Player Phase)

Breath of Ruin (Mixed Phase)

Vengeful Dragon (Defensive Tank)

Ire of the Maddened Coyote (Dual Phase)

Recommended
Gradivus A Warding Breath
Alternate: Brazen Def/Res 3
Pivot
Alternate: Swap
B Bold Fighter 3
Aether
Alternate: Glimmer
C Armor March 3
Alternate: Ward Armor
SP1935SQuick Riposte 3

An Exceptional Judge of Character (Pure Enemy-Phase)

Special Sacean (Special Fighter)

Underneath the Mistletoe (Defensive Tank)

Guess I’ll Die (Special Fighter Offensive)

Long Live the Future King (Enemy Phase Focus)

Blazing Resistor (Mixed Tank)

Stout Beefcake (Enemy Phase Bruiser)

Chalphy’s Shield (Physical Tank)

Greil's Legacy (Defensive Bruiser)

The Avenger (Defensive Duelist)

DURANDAL! (Defensive Bruiser)

The Ironwilled Spandex (Defensive Tank)

Recommended
Slaying Axe+ (+Def) A Steady Breath
Alternate: Steady Stance 3
Reposition B Quick Riposte 3
Alternate: Renewal 3
Aether
Alternate: Sol
C Infantry Pulse 3
Alternate: Panic Ploy 3
SP1935SClose Def 3
Alternate: Defense +3

Awakened Blade (Generalist Masked Marth)

Bridezilla (Melee Specialist)

No Sympathy (Defensive Bruiser)

Resilient Rabbit (Defensive)

Rhapsody of the Dragon Priestess (Pure Support)

Pride of the Cross Knights (Defensive Bruiser)

Offensive Powerhouse

Recommended
Siegmund (+Eff) A Death Blow 4
Alternate: Sturdy Blow 2
Reposition
Alternate: Rally Defense
B Vantage 3
Alternate: Wrath 3
Aether
Alternate: Glimmer
C Odd Atk Wave 3
Alternate: Hone Spd 3
SP2085SHeavy Blade 3

Flame Siegmund

Steady Flame (Defensive Tank)

Ranged Tank (Distant Counter)

Steady Tank (Steady Breath)

Reliable Hero (Physical Tank)

Recommended
Slaying Axe+ (+Def) A Steady Breath
Alternate: Earth Boost 3
Reposition
Alternate: Swap
B Quick Riposte 3
Aether
Alternate: Sol
C Atk Smoke 3
Alternate: Spur Def/Res 2
SP2055SClose Def 3

Dragon Panzer (Defensive Tank)

Now, it's my turn! (Defensive)

Winner Winner Chicken Dinner (Defensive Tank)

Great Wall of Ylisse (Defensive)

How Adorable! (Mixed Phase Cherche's Axe)

High Flying Slayer (Slaying Axe)

Hammer Time (Anti Armor)

Haute Couture (Generalist Flier)

Recommended
Hauteclere (+Eff) A Atk/Def Bond 3
Alternate: Fury 3
Reposition B Quick Riposte 3
Alternate: Lancebreaker 3
Aether
Alternate: Luna
C Hone Fliers
Alternate: Goad Fliers
SP1995SHeavy Blade 3

Haute Take (Mixed Team Duelist)

Yare Yare Daze (Melee Enemy Phase)

Gladiator's Goddess (Arena Support)

I’ve Made My Choice! (Defensive Tank)

The Resolve of Hoshido (Enemy Phase Bruiser)

Breath of Destruction (Defensive Tank)

* HEAVY BREATHING * (Melee Specialist)

Aether

Overview

A special famous for being the signature move of Ike, Aether is one of the strongest specials available in Fire Emblem Heroes and is capable of turning the tides of battle given the right circumstances. Aether does not have inheritance restrictions, and can be given to all units save for staff-users. Its high impact effects are gated behind a long cooldown time of five turns, which nearly guarantees that the opponent will have charged their special before you do, perhaps even multiple times if they wield a Brave, Killer or Slaying weapon. Even with help, most duels do not last long enough to charge and use Aether. Instead, it can encourage a different playstyle: charge it on the first opponent, and unleash it on the second. Aether combines the functions of both Sol and Luna, with the added advantage of healing more health than Sol, as Luna boosts the damage dealt. Being worth 500sp, Aether is commonly seen on Arena sets to maximise score.

Synergy

Aether's long charge time means it will rarely activate without skills designed to accelerate special charge time. Most commonly, Breath skills are seen in combination with Aether. A Killing/Slaying weapon combined with Steady Breath and Quick Riposte will guarantee an Aether on the unit's second attack. Aside from builds designed to maximise Arena score, Aether is most commonly seen on tanks with high Defense and/or Resistance who can use it to sustain over a long period of time. Like other healing specials, Aether is a great choice for longer modes where it can keep a unit healthy over a long period of time. Aether is great with high-attack units, but has poor synergy with Wrath since the damage boost will be activated less frequently. Healing from skills such as Renewal can help a unit last till the special is ready. Triangle Adept is a good skill to use alongside Aether: It can let a unit charge their special safely on a foe with disadvantage, to unleash on a neutral-color foe.

Weaknesses

The biggest weakness to Aether is its long charge time. It is possible to reduce this charge period, however all of the methods used for Aether can be used to charge faster specials even more quickly. A unit attempting to charge Aether may have to suffer two specials from the opponent before they can get a chance to unleash their own special. Thus the easiest way to defeat a user of Aether is to maximize on a special such as Bonfire or Iceberg, with a faster charge time while boasting high power.