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

Boss Unit for This Mythic Hero Battle
Arval [9.0/10]

Mythic Hero Battle: Arval Strategy Overview

Featured Hero	Arval
First Clear Reward	Abyssal: Gold Winglet Hairpin Infernal: x4 Lunatic: ×3 Hard: ×2 Normal: 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	10/31/2022 - 11/14/2022

Unit Placement

Abyssal	Infernal

Abyssal Enemy Information

A Troubadour		HP 65		Atk 48		Spd 26		Def 24		Res 49
		： Gravity+ ： Restore+ ： Windfire Balm+					： Def/Res Form 3 ： A/R Far Trace 3 ： Def/Res Menace ：- ：-
B Arval		HP 80		Atk 79		Spd 36		Def 32		Res 64
		： Rite of Souls ：- ： Glacies					： Duality ： Atk/Res Tempo 3 ： Atk/Res Oath 4 ： ：-
C Bow Fighter		HP 84		Atk 58		Spd 42		Def 32		Res 18
		： Firesweep Bow+ ：- ： Moonbow					： Life and Death 3 ： Lull Spd/Def 3 ： Savage Blow 3 ： Savage Blow 3 ：-
D Blue Mage		HP 75		Atk 57		Spd 45		Def 27		Res 39
		： Blárlion+ ：- ： Iceberg					： Fury 3 ： Spd Preempt 3 ： Panic Ploy 3 ： Mirror Stance 2 ：-
E Sword Fighter		HP 87		Atk 54		Spd 41		Def 39		Res 27
		： Armorsmasher+ ：- ： Glimmer					： Sturdy Impact ： Null Follow-Up 3 ： Even Tempest 3 ：- ：-
F Axe Knight		HP 94		Atk 56		Spd 14		Def 51		Res 23
		： Brave Axe+ ：- ： Ignis					： Atk/Def Solo 3 ： Bold Fighter 3 ： Joint Dist. Guard ： Deflect Magic 3 ：-

Abyssal Reinforcements

View Abyssal Enemy Reinforcements

Turn 2 Reinforcements

Reinforcements 1 Green Bat		HP 75		Atk 56		Spd 57		Def 43		Res 28
		： Bat Fang ：- ： Moonbow					： Atk/Spd Clash 4 ： Dive-Bomb 3 ： Spd/Def Rein 3 ： Atk/Spd Solo 3 ：-
Reinforcements 1 Sword Fighter		HP 89		Atk 54		Spd 44		Def 39		Res 27
		： Up-Front Blade+ ：- ： Bonfire					： Sturdy Impact ： Wings of Mercy 3 ： Inf. Null Follow 3 ：- ：-
Reinforcements 1 Green Mage		HP 75		Atk 52		Spd 44		Def 24		Res 36
		： Gronnowl+ ：- ： Draconic Aura					： Atk/Spd Form 3 ： Mystic Boost 3 ： Def/Res Smoke 3 ：- ：-
Reinforcements 1 Sword Dragon		HP 82		Atk 67		Spd 38		Def 49		Res 32
		： Vulture Blade+ ：- ： Reprisal					： Fury 3 ： Guard Bearing 3 ： Atk Smoke 4 ： Fury 3 ：-

Turn 3 Reinforcements

Reinforcements 2 Blue Cavalier		HP 69		Atk 53		Spd 30		Def 20		Res 41
		： Blárraven+ ：- ： Miracle					： Triangle Adept 3 ： Bowbreaker 3 ： Fatal Smoke 3 ：- ：-
Reinforcements 2 Blue Manakete		HP 88		Atk 55		Spd 39		Def 41		Res 36
		： Water Breath+ ：- ： Draconic Aura					： Def/Res Solo 3 ： Dragon's Ire 3 ： C Feud 3 ： Distant Counter (D) ：-

Turn 4 Reinforcements

Reinforcements 3 Green Fáfnir		HP 83		Atk 56		Spd 44		Def 41		Res 35
		： Flametongue+ ：- ： Moonbow					： Atk/Spd Catch 3 ： Dive-Bomb 3 ： Even Tempest 3 ： Heavy Blade 3 ：-
Reinforcements 3 Axe Knight		HP 99		Atk 62		Spd 19		Def 55		Res 23
		： Slaying Axe+ ：- ： Bonfire					： Atk/Def Ideal 4 ： Daring Fighter 3 ： Assault Troop 3 ：- ：-

Infernal Enemy Information

A Troubadour		HP 41		Atk 45		Spd 23		Def 22		Res 45
		： Gravity+ ： Restore+ ： Windfire Balm+					： Def/Res Form 3 ： A/R Far Trace 3 ： Def/Res Menace ：- ：-
B Arval		HP 64		Atk 71		Spd 30		Def 26		Res 56
		： Rite of Souls ：- ： Glacies					： Duality ： Atk/Res Tempo 3 ： Atk/Res Oath 4 ：- ：-
C Bow Fighter		HP 63		Atk 54		Spd 39		Def 29		Res 16
		： Firesweep Bow+ ：- ： Moonbow					： Life and Death 3 ： Lull Spd/Def 3 ： Savage Blow 3 ：- ：-
D Blue Mage		HP 54		Atk 53		Spd 41		Def 25		Res 36
		： Blárlion+ ：- ： Iceberg					： Fury 3 ： Spd Preempt 3 ： Panic Ploy 3 ：- ：-
E Sword Fighter		HP 66		Atk 50		Spd 37		Def 36		Res 24
		： Armorsmasher+ ：- ： Glimmer					： Sturdy Impact ： Null Follow-Up 3 ： Even Tempest 3 ：- ：-
F Axe Knight		HP 76		Atk 52		Spd 12		Def 47		Res 21
		： Brave Axe+ ：- ： Ignis					： Atk/Def Solo 3 ： Bold Fighter 3 ： Joint Dist. Guard ：- ：-

Infernal Reinforcements

View Infernal Enemy Reinforcements

Turn 2 Reinforcements

Reinforcements 1 Green Bat		HP 54		Atk 52		Spd 53		Def 39		Res 25
		： Bat Fang ：- ： Moonbow					： Atk/Spd Clash 4 ： Dive-Bomb 3 ： Spd/Def Rein 3 ：- ：-
Reinforcements 1 Sword Fighter		HP 68		Atk 50		Spd 40		Def 36		Res 24
		： Up-Front Blade+ ：- ： Bonfire					： Sturdy Impact ： Wings of Mercy 3 ： Inf. Null Follow 3 ：- ：-
Reinforcements 1 Green Mage		HP 54		Atk 48		Spd 40		Def 22		Res 33
		： Gronnowl+ ：- ： Draconic Aura					： Atk/Spd Form 3 ： Mystic Boost 3 ： Def/Res Smoke 3 ：- ：-
Reinforcements 1 Sword Dragon		HP 62		Atk 60		Spd 33		Def 42		Res 26
		： Vulture Blade+ ：- ： Reprisal					： Fury 3 ： Guard Bearing 3 ： Atk Smoke 4 ：- ：-

Turn 3 Reinforcements

Reinforcements 2 Blue Cavalier		HP 45		Atk 49		Spd 28		Def 18		Res 37
		： Blárraven+ ：- ： Miracle					： Triangle Adept 3 ： Bowbreaker 3 ： Fatal Smoke 3 ：- ：-
Reinforcements 2 Blue Manakete		HP 67		Atk 51		Spd 36		Def 38		Res 33
		： Water Breath+ ：- ： Draconic Aura					： Def/Res Solo 3 ： Dragon's Ire 3 ： C Feud 3 ：- ：-

Turn 4 Reinforcements

Reinforcements 3 Green Fáfnir		HP 62		Atk 53		Spd 40		Def 37		Res 32
		： Flametongue+ ：- ： Moonbow					： Atk/Spd Catch 3 ： Dive-Bomb 3 ： Even Tempest 3 ：- ：-
Reinforcements 3 Axe Knight		HP 81		Atk 58		Spd 17		Def 51		Res 21
		： Slaying Axe+ ：- ： Bonfire					： Atk/Def Ideal 4 ： Daring Fighter 3 ： Assault Troop 3 ：- ：-

Damage Calculator Tool

Mythic Hero Battle: Arval Strategy

Use a Player Phase strategy with Galeforce and repeated actions

With six foes at the start of the match, it is possible to use a strategy involving repeated actions using Galeforce or Duo/Harmonized skills to clear the map on turn one, or eliminate most of the enemies and kite the remaining leftovers.

Units like Ninja Lyn, Ninja Corrin (F), and Summer Edelgard work fantastic in this map with their own abilities to generate additional actions. The Ninja duos can use their Duo Skills while Summer Edelgard can use Raging Storm to create an additional action for themselves. Summer Edelgard can even equip Galeforce to get a third action!

However, due to the distance of your team from the enemies' initial spawn locations, Wings of Mercy and/or similar warp skills will be required in order to reach the enemies on turn one. Equip your initiator unit(s) with self-recoil skills like Fury 4 or Atk/Spd Push 4 in order to get them to the required HP threshold.

Key support units for this strategy include Hatari Azura and New Year Peony. These two refresher units can generate an additional action for an ally with their unique refresh skills, and another action on top of that with their own Duo/Harmonized skills too.

Alternatively, use Savior units to tank the enemies

With the exception of Arval, the enemies on this map are not too threatening. Using a Near Save unit and a Far Save unit with two support units (ideally a healer and a refresher) can also clear the map by withstanding the enemies and winning through attrition.

The Far Save unit will be key because he/she needs to be able to survive Arval's attack. Using a fast unit with a skill that prevents enemy follow-up attacks will help by ensuring Arval only attacks once.

Alternatively, using a colorless unit that attacks Arval's lower Def stat can deny Arval's color advantage and potentially defeat them in one round.

Units we recommend for the Far Save role include Ascended Fjorm, Rearmed Robin (F), and Caineghis.

Watch out for various movement/warp skills!

Some enemies on this map come with movement and warp skills that can cause unexpected movement and lead to your defeat. Take note of the following enemies:

• Arval has Atk/Res Oath 4 which allows warping to nearby allies.
• The Sword Fighter on turn one has Even Tempest 3 to receive +1 movement on even numbered turns.
• The Sword Fighter on turn two has Wings of Mercy 3 to warp adjacent to any wounded ally in the map.
• The Green Bat on turn two can transform and receive +1 movement upon meeting the transform conditions.
• The Green Fafnir on turn four has Even Tempest 3 to receive +1 movement on even numbered turns.
• The Axe Knight on turn four has Assault Troop 3 to move up to three spaces in cardinal directions.

Recommended Units for Mythic Hero Battle: Arval

Player Phase Units With Multiple Actions

Unit Name
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 Corrin (F)	Green Tome Cavalry Ninjutsu Scrolls' brave effect can quickly defeat enemies. Duo Skill grants herself an additional action.
Ninja Lyn	Colorless Dagger Flying Tailwind Shuriken's brave effect can quickly defeat enemies. Duo Skill grants herself an additional action.
Legendary Leif	Colorless Bow Cavalry Meisterbogen's brave effect can quickly defeat enemies. Njörun's Zeal grants himself an additional action when triggered.
Brave Marianne	Colorless Tome Infantry Requiem Dance grants a nearby ally an additional action.

Savior Tank Units

Unit Name
Brave Hector	Lance Armored The king of blue tank units. Can counterattack at a distance, deny enemy follow-ups, and have his own follow-up attack.
Ascended Idunn	Blue Breath Armored A Brave Hector that attacks with magic damage and has higher base stats.
Ascended Fjorm	Axe Armored Can heal post-combat with Nifl's Bite and mitigate damage with Ice Mirror and Hardy Fighter 3. Nifl's Bite allows a counterattack against sweep effects.
Rearmed Robin (F)	Colorless Breath Armored Deals magic damage to melee foes and adaptive damage to ranged foes. Very high Spd stat and Hardy Fighter 3 prevents enemy follow-up attacks. Can equip Dist. Counter (D) Sacred Seal to retaliate against ranged foes.
Caineghis	Colorless Beast Armored Can retaliate against ranged foes when transformed. Refined Lion King Fang gives incredible bulk. Is not affected by Arval's weapon-triangle advantage and attacks the lower Def stat.

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.
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 dealing effective damage against dragon foes.
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 Refresher-Assist Units

Mythic Hero Battle: Arval Abyssal Strategy Example

Currently Unavailable!

An Abyssal strategy example for Mythic Hero Battle: Arval is currently unavailable. Stay tuned!

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