This is a guide to clearing the Infernal and Abyssal maps for Bound Hero Battle: Heiðrún & Eikþyrnir in Fire Emblem Heroes (FEH). To see strategy for defeating Bound Hero Battle: Heiðrún & Eikþyrnir, enemy information, as well as the best units and party to use, read on!

Boss Units for This Mythic Hero Battle
Heiðrún [9.9/10] Eikþyrnir [9.5/10]

Bound Hero Battle: Heiðrún & Eikþyrnir Strategy Overview

Featured Hero	Heiðrún Eikþyrnir
First Clear Reward	Abyssal: Gold Dancer's Ribbon Infernal: x4 Lunatic: ×3 Hard: ×2 Normal: x1 x1
Recommended Level	Lv.40
Difficulty	Abyssal Infernal Lunatic Hard
Conditions	Condition 1: All units must survive Condition 2: Cannot use Light's Blessing
Dates Active	07/26/2024 - 08/09/2024

Unit Placement

Abyssal	Infernal

Abyssal Enemy Information

A Eikþyrnir		HP 86		Atk 74		Spd 23		Def 61		Res 39
		： Quieting Antler ：- ： Fierce Beast					： Atk/Def Excel ： Divine Strength ： Beast Threaten ： Obstruct 3 ：-
B Heiðrún		HP 80		Atk 65		Spd 23		Def 68		Res 72
		： Nectar Horn ：- ： Aegis					： Stronghold ： Atk/Def Bulwark 4 ： Divine Nectar ： Fort. Def/Res 2 ：-
C Bow Fighter		HP 86		Atk 54		Spd 37		Def 40		Res 23
		： Spendthrift Bow+ ： Rally Up Atk+ ： Moonbow					： Sturdy Impact ： Lull Atk/Def 3 ： Atk Smoke 3 ： Def Feint 3 ：-
D Red Bat		HP 75		Atk 56		Spd 57		Def 43		Res 28
		： Bat Fang ： Reposition ： Galeforce					： Atk/Spd Wild ： Spd/Res Link 3 ： Spd/Def Rein 3 ： Atk/Def Clash 3 ：-
E Green Manakete		HP 88		Atk 55		Spd 39		Def 37		Res 40
		： Water Breath+ ： Harsh Command+ ： Dragon's Roar					： Bracing Stance 2 ： High Dragon Wall ： Canto Control 3 ： Mystic Boost 3 ：-
F Lance Cavalier		HP 82		Atk 58		Spd 32		Def 40		Res 38
		： Instant Lance+ ：- ： Escutcheon					： Atk/Def Excel ： Drag Back ： Panic Smoke 3 ： Fury 3 ：-

Abyssal Reinforcements

View Abyssal Enemy Reinforcements

Turn 2 Reinforcements

Reinforcements 1 Red Manakete		HP 88		Atk 58		Spd 42		Def 40		Res 39
		： Lightning Breath+ ：- ： Glimmer					： Fury 3 ： Counter Roar 4 ： Panic Ploy 3 ： Quick Riposte 3 ：-
Reinforcements 1 Red Cavalier		HP 69		Atk 55		Spd 30		Def 20		Res 41
		： Rauðrblade+ ：- ： Moonbow					： Swift Sparrow 2 ： S/R Far Trace 4 ： Rouse Atk/Spd 3 ： Even Def Wave 3 ：-
Reinforcements 1 Lance Fighter		HP 89		Atk 54		Spd 41		Def 39		Res 31
		： Barrier Lance+ ：- ： Sacred Cowl					： Distant Def 3 ： Atk/Def Bulwark 4 ： Rouse Def/Res 3 ： Distant Def 3 ：-

Turn 3 Reinforcements

Reinforcements 2 Red Flier		HP 72		Atk 50		Spd 45		Def 19		Res 38
		： Rauðrfox+ ：- ： Glimmer					： Atk/Spd Form 3 ： Wings of Mercy 4 ： Spd/Res Rein 3 ： Atk/Res Rein 3 ：-
Reinforcements 2 Lance Cavalier		HP 82		Atk 55		Spd 29		Def 37		Res 35
		： Protection Pike+ ：- ： Bonfire					： Atk/Def Clash 3 ： Mystic Boost 3 ： Alarm Atk/Def ： Deflect Magic 3 ：-

Turn 4 Reinforcements

Reinforcements 3 Blue Thief		HP 77		Atk 49		Spd 49		Def 23		Res 41
		： Clever Dagger+ ：- ： Lethality					： Sturdy Blow 2 ： Assassin's Strike ： Pulse Smoke 3 ： Blade Session 3 ：-
Reinforcements 3 Axe Fighter		HP 87		Atk 54		Spd 41		Def 39		Res 27
		： Slaying Hammer+ ：- ： Glimmer					： Swift Sparrow 2 ： Phys. Null Follow ： Time's Pulse 3 ： Atk/Def Finish 3 ：-

Infernal Enemy Information

A Eikþyrnir		HP 72		Atk 66		Spd 17		Def 52		Res 33
		： Quieting Antler ：- ： Fierce Beast					： Atk/Def Excel ： Divine Strength ： Beast Threaten ：- ：-
B Heiðrún		HP 64		Atk 60		Spd 17		Def 56		Res 59
		： Nectar Horn ：- ： Aegis					： Stronghold ： Atk/Def Bulwark 4 ： Divine Nectar ：- ：-
C Bow Fighter		HP 65		Atk 50		Spd 34		Def 37		Res 21
		： Spendthrift Bow+ ： Rally Up Atk+ ： Moonbow					： Sturdy Impact ： Lull Atk/Def 3 ： Atk Smoke 3 ：- ：-
D Red Bat		HP 54		Atk 52		Spd 53		Def 39		Res 25
		： Bat Fang ： Reposition ： Galeforce					： Atk/Spd Wild ： Spd/Res Link 3 ： Spd/Def Rein 3 ：- ：-
E Green Manakete		HP 67		Atk 51		Spd 36		Def 34		Res 37
		： Water Breath+ ： Harsh Command+ ： Dragon's Roar					： Bracing Stance 2 ： High Dragon Wall ： Canto Control 3 ：- ：-
F Lance Cavalier		HP 62		Atk 51		Spd 27		Def 35		Res 33
		： Instant Lance+ ：- ： Escutcheon					： Atk/Def Excel ： Drag Back ： Panic Smoke 3 ：- ：-

Infernal Reinforcements

View Infernal Enemy Reinforcements

Turn 2 Reinforcements

Reinforcements 1 Red Manakete		HP 67		Atk 54		Spd 39		Def 37		Res 36
		： Lightning Breath+ ：- ： Glimmer					： Fury 3 ： Counter Roar 4 ： Panic Ploy 3 ：- ：-
Reinforcements 1 Red Cavalier		HP 45		Atk 51		Spd 28		Def 18		Res 37
		： Rauðrblade+ ：- ： Moonbow					： Swift Sparrow 2 ： S/R Far Trace 4 ： Rouse Atk/Spd 3 ：- ：-
Reinforcements 1 Lance Fighter		HP 68		Atk 50		Spd 37		Def 36		Res 28
		： Barrier Lance+ ：- ： Sacred Cowl					： Distant Def 3 ： Atk/Def Bulwark 4 ： Rouse Def/Res 3 ：- ：-

Turn 3 Reinforcements

Reinforcements 2 Red Flier		HP 48		Atk 47		Spd 41		Def 17		Res 35
		： Rauðrfox+ ：- ： Glimmer					： Atk/Spd Form 3 ： Wings of Mercy 4 ： Spd/Res Rein 3 ：- ：-
Reinforcements 2 Lance Cavalier		HP 62		Atk 51		Spd 57		Def 35		Res 33
		： Protection Pike+ ：- ： Bonfire					： Atk/Def Clash 3 ： Mystic Boost 3 ： Alarm Atk/Def ：- ：-

Turn 4 Reinforcements

Reinforcements 3 Blue Thief		HP 56		Atk 46		Spd 45		Def 21		Res 37
		： Clever Dagger+ ：- ： Lethality					： Sturdy Blow 2 ： Assassin's Strike ： Pulse Smoke 3 ：- ：-
Reinforcements 3 Axe Fighter		HP 66		Atk 50		Spd 37		Def 36		Res 24
		： Slaying Hammer+ ：- ： Glimmer					： Swift Sparrow 2 ： Phys. Null Follow ： Time's Pulse 3 ：- ：-

Damage Calculator Tool

Bound Hero Battle: Heiðrún & Eikþyrnir Strategy

Use a Player Phase strategy with Galeforce and repeated actions

It is possible to clear this map with a Hit and Run strategy if the team is properly built.

Using units with multiple actions, clear as many enemies as you can on the first turn while remaining out of range of the enemies. A ranged cavalry unit on the leftmost starting tile can reach the enemies right away, and following up with a 3-movement refresher unit allows you to clear both the Green Manakete and the Lance Cavalier immediately. However, defeating the Lance Cavalier puts you in range of Eikþyrnir; use a Canto effect to retreat to safety afterwards and keep yourself out of range.

Slowly take down the enemies whenever possible while ensuring that your units are outside the danger area of the enemies.

Heiðrún is very bulky and most likely cannot be defeated in one combat. Instead, use ranged units to whittle down her HP over time, and then retreat to safety using movement assists and refresher units.

Keep Heiðrún's Divine Nectar in mind, as her allies can use movement assists and generate extra actions afterwards which may be able to reach your units!

If Heiðrún is the last enemy remaining, Divine Nectar will fail to trigger, making her easier to defeat in combat.

Alternatively, use Savior units to tank the enemies

An enemy phase tanking strategy is possible in this map, but requires proper support to be able to withstand Eikþyrnir's attacks.

The easiest method to clear this map with an enemy phase strategy is to field both a Near Save and a Far Save unit, a healer, and a ranged glass cannon unit. The glass cannon unit's job is to defeat Eikþyrnir in one combat, while the other three protect your team from all attacks.

Once Eikþyrnir is in range, use your ranged glass cannon unit to bring him down, and then retreat back to the safety of your Savior tanks.

Heiðrún is very bulky, but she does not hit hard enough to be able to defeat your tank units in one round. It is very likely she will be the last foe remaining on the map after your Savior tanks have cleared the rest of the enemies. Once she is alone, Divine Nectar will fail to trigger and she will lose her pre-combat healing and one damage reduction effect.

Slowly whittle her down using your glass cannon ranged unit and she will eventually fall.

Recommended Units for Bound Hero Battle: Heiðrún & Eikþyrnir

Player Phase Units With Multiple Actions

Unit Name
Winter Edelgard	Lance Armored Black Yule Lance creates 【Divine Vein (Flame)】 tiles, grants Special cooldown charges pre-combat, and cuts the effectiveness of enemy damage reduction skills. Raging Tempest grants mobility and one additional action after combat. Inheriting Galeforce can grant a third action per turn.
Summer Edelgard	Sword Armored Regal Sunshade's brave effect can quickly eliminate enemies. Raging Storm can grant one additional action after combat. Inheriting Galeforce can grant a third action per turn.
Legendary Edelgard	Axe Armored Raging Storm can grant one additional action after combat. Inheriting Galeforce can grant a third action per turn.
Ninja Sanaki	Red Tome Cavalry Radiant Scrolls' brave effect can quickly defeat enemies. Duo Skill grants herself an additional action.
Ninja Corrin (F)	Green Tome Cavalry Ninjutsu Scrolls' brave effect can quickly defeat enemies. Duo Skill grants herself an additional action.
Ninja Laegjarn	Blue Bow Flying Flamefrost Bow's brave effect can quickly defeat enemies. Duo Skill grants herself an additional action.
Fallen Chrom	Sword Cavalry Arcane Devourer has Special acceleration, allowing an easy Galeforce trigger. Fate Unchanged... allows a Reposition effect while inflicting 【Exposure】onto multiple foes.
Brave Chrom	Lance Cavalry Geirdriful grants bonus stats and Special cooldown charges in combat. A Fate Changed! allows a Reposition effect while granting Brave Chrom an extra action and copies ally's bonuses, granting them to himself.
Legendary Leif	Colorless Bow Cavalry Meisterbogen's brave effect can quickly defeat enemies. Njörun's Zeal II grants himself an additional action when triggered.
Gullveig	Colorless Tome Cavalry Quietus Gullveig and Time is Light grant herself additional actions after combat. Flared Sparrow leaves behind 【Divine Vein (Flame)】 terrain, softening up enemies for future engagements.

Savior Tank Units

Winter Byleth (M)	Sword Armored Holy Yule Blade decays foe's Specials and grants multiple stat bonuses. Supreme Heaven deals bonus damage against dragons and beasts and also grants additional damage reduction.
Brave Corrin (F)	Colorless Breath Armored Multiple damage reduction effects and the 【Divine Vein (Stone)】 effect paired with high Spd allow her to survive multiple engagements.
Brave Hector	Lance Armored An old but still effective Blue tank unit. Can counterattack at a distance, deny enemy follow-ups, and has his own follow-up attack.
Ascended Idunn	Blue Breath Armored Guaranteed follow-up attack. Weapon is comparable to Brave Hector's refined Maltet. Can neutralize penalties inflicted on her.
Brave Edelgard	Axe Armored High mobility for an armored unit. Incredibly sturdy with refined Flower Hauteclere and Black Eagle Rule granting multiple defensive effects.
Caineghis	Colorless Beast Armored Refined Lion King Fang grants multiple defensive effects and guaranteed follow-up attacks on both phases. Nullifies buffs from ranged units.

Support Units

Unit Name
Elimine	Staff Flying Grants damage reduction, healing, and can shut down "At start of turn" effects of foes in cardinal directions upon winning a Res check.
Halloween Flayn	Staff Cavalry Kitty-Cat Parasol grants Special cooldown charges, 30% damage reduction, and "neutralizes foe's bonuses to Atk" to nearby allies and can double as an offensive unit with high Atk and a guaranteed follow-up attack.
Flayn	Staff Flying Grants damage reduction and healing.
Brave Lucina	Lance Infantry Grants bonus stats and Special acceleration to nearby allies. Can double as an offensive unit with refined Geirskögul
Corrin (M)	Sword Infantry Grants bonus stats to his Ally Support during combat.
Summer Hilda	Staff Flying Grants Atk+6 and Special acceleration to nearby allies during combat.

Refresher Units

Unit Name
New Year Peony	Green Tome Flying Grants additional Atk to allies in similar cardinal directions. Can use her Duo Skill to grant another action to an adjacent ally.
Peony	Blue Tome Flying Grants additional Atk and Spd to allies in similar cardinal directions.
Legendary Azura	Blue Tome Flying Grants additional bonuses equal to highest bonus on unit and +1 movement.
Hatari Azura	Green Tome Cavalry Grants +6 to all stats and +1 movement to target unit and all adjacent allies. Can use Harmonized Skill to grant extra actions to allies.

List of All Dancers | Heroes with Refresher Skills

Bound Hero Battle: Heiðrún & Eikþyrnir Abyssal Strategy Example

Currently Unavailable!

An Abyssal strategy example for Bound Hero Battle: Heiðrún & Eikþyrnir is currently unavailable. Stay tuned!

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List of Mythic Hero Battles

All Mythic Hero Battles
Læraðr and Níðhöggr
Hræsvelgr: Quieting Blade	Heiðrún and Eikþyrnir
Loki: Trickster God	Emblem Marth and Mythic Lumera
Gullveig and Kvasir	Veyle: Gentle Dragon
Freyr: Dream-King	Nerþuz: God of the Land
Fomortiis and Gotoh	Veronica and Embla
Arval: Cycle Keeper	Askr: God of Openness
Medeus: Earth-Dragon King	Elimine: Scouring Saint
Thórr and Eitri	Ótr: Kingsbrother
Ullr: The Bowmaster	Ashera: Order Goddess
Dagr: Sun's Radiance	Seiros: Saint of Legend
Freyja and Triandra	Plumeria: Lewd Dream
Hel: Death Sovereign	Mila: Goddess of Love
Bramimond: the Enigma	Líf: Lethal Swordsman
Thrasir: Omnicidal Witch	Altina: Dawn's Trueblade
Sothis: Girl on the Throne	Naga: Dragon Divinity
Yune: Chaos Goddess	Duma: God of Strength