Seiros: Saint of Legend Abyssal Guide and Recommended Team (Mythic Hero Battle)

This is a guide to clearing the Infernal and Abyssal maps for Seiros: Saint of Legend in Fire Emblem Heroes (FEH). To see strategy for defeating Seiros: Saint of Legend, enemy information, as well as the best units and party to use, read on!

Boss Unit for This Legendary Hero Battle
Seiros [9.0/10]

Seiros: Saint of Legend Strategy Overview

Featured Hero	Seiros
First Clear Reward	Abyssal: Gold Hawk Guard 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	01/28/2021-02/05/2021

Unit Placement

Abyssal	Infernal

Abyssal Enemy Information

A Red Manakete		HP 88		Atk 55		Spd 39		Def 37		Res 36
		： Lightning Breath+ ：- ： Reprisal					： Kestrel Stance 2 ： Dragon's Ire 3 ： Close Guard 3 ： Fierce Stance 3
B Blue Fáfnir		HP 83		Atk 55		Spd 47		Def 44		Res 42
		： Light Breath+ ： Swap ： Dragon Fang					： Fury 3 ： Atk/Spd Link 3 ： Spd Ploy 3 ： Atk Ploy 3
C Seiros		HP 80		Atk 73		Spd 25		Def 49		Res 52
		： Aurora Breath ：- ： Glacies					： Mirror Impact ： Dragon Wall 3 ： Wings of Light ： Quick Riposte 3
D Green Fáfnir		HP 83		Atk 52		Spd 47		Def 41		Res 35
		： Water Breath+ ：- ： Ignis					： Atk/Res Solo 3 ： Chill Atk 3 ： Atk/Def Gap 3 ： Atk/Spd Solo 3
E Sword Dragon		HP 77		Atk 53		Spd 27		Def 43		Res 26
		： Brave Sword+ ：- ： Bonfire					： Brazen Atk/Def 3 ： Escape Route 3 ： Pulse Smoke 3 ：-
F Green Flier		HP 72		Atk 52		Spd 45		Def 19		Res 38
		： Rexcalibur+ ： Rally Up Atk+ ： Growing Wind					： Triangle Adept 3 ： Flier Formation 3 ： Atk/Spd Rein 3 ：-

Damage Calculator Tool

Abyssal Reinforcements

View Abyssal Enemy Reinforcements

Turn 2 Reinforcements

Reinforcements 1 Lance Flier		HP 76		Atk 50		Spd 42		Def 28		Res 43
		： Slaying Spear+ ：- ： Glimmer					： Swift Sparrow 2 ： Windsweep 3 ： Ward Fliers ：-
Reinforcements 1 Red Fáfnir		HP 83		Atk 52		Spd 44		Def 45		Res 35
		： Light Breath+ ：- ： Bonfire					： Heavy Blade 3 ： Renewal 3 ： Goad Dragons ： Iote's Shield
Reinforcements 1 Cleric		HP 74		Atk 50		Spd 37		Def 28		Res 46
		： Melancholy+ ： Recover+ ： Heavenly Light					： HP/Atk 2 ： Live to Serve 3 ： Distant Guard 3 ：-

Turn 3 Reinforcements

Reinforcements 2 Green Thief		HP 77		Atk 52		Spd 49		Def 20		Res 43
		： The Cleaner+ ：- ： Draconic Aura					： Attack/Res 2 ： Odd Pulse Tie 3 ： Def Ploy 3 ：-
Reinforcements 2 Bow Cavalier		HP 78		Atk 58		Spd 30		Def 29		Res 28
		： Shining Bow+ ：- ： Miracle					： Mirror Strike 2 ： Lull Atk/Res 3 ： Panic Smoke 3 ： Sturdy Blow 2

Turn 4 Reinforcements

Reinforcements 3 Sword Cavalier		HP 77		Atk 49		Spd 24		Def 33		Res 35
		： Brave Sword+ ：- ： Luna					： Atk/Def Form 3 ： Bowbreaker 3 ： Threat. Atk/Def 2 ：-
Reinforcements 3 Red Flier		HP 72		Atk 54		Spd 52		Def 14		Res 33
		： Rauðrfox+ ：- ： Moonbow					： Life and Death 3 ： Desperation 3 ： Spd/Res Rein 3 ： Aerobatics 3

Infernal Enemy Information

A Red Manakete		HP 67		Atk 51		Spd 36		Def 34		Res 33
		： Lightning Breath+ ：- ： Reprisal					： Kestrel Stance 2 ： Dragon's Ire 3 ： Close Guard 3 ：-
B Blue Fáfnir		HP 62		Atk 52		Spd 43		Def 40		Res 39
		： Light Breath+ ： Swap ： Dragon Fang					： Fury 3 ： Atk/Spd Link 3 ： Spd Ploy 3 ：-
C Seiros		HP 64		Atk 65		Spd 19		Def 41		Res 44
		： Aurora Breath ：- ： Glacies					： Mirror Impact ： Dragon Wall 3 ： Wings of Light ：-
D Green Fáfnir		HP 62		Atk 49		Spd 43		Def 37		Res 32
		： Water Breath+ ：- ： Ignis					： Atk/Res Solo 3 ： Chill Atk 3 ： Atk/Def Gap 3 ：-
E Sword Dragon		HP 57		Atk 49		Spd 25		Def 39		Res 23
		： Brave Sword+ ：- ： Bonfire					： Brazen Atk/Def 3 ： Escape Route 3 ： Pulse Smoke 3 ：-
F Green Flier		HP 48		Atk 49		Spd 41		Def 17		Res 35
		： Rexcalibur+ ： Rally Up Atk+ ： Growing Wind					： Triangle Adept 3 ： Flier Formation 3 ： Atk/Spd Rein 3 ：-

Infernal Reinforcements

View Infernal Enemy Reinforcements

Turn 2 Reinforcements

Reinforcements 1 Lance Flier		HP 55		Atk 47		Spd 38		Def 26		Res 39
		： Slaying Spear+ ：- ： Glimmer					： Swift Sparrow 2 ： Windsweep 3 ： Ward Fliers ：-
Reinforcements 1 Red Fáfnir		HP 62		Atk 49		Spd 40		Def 41		Res 32
		： Light Breath+ ：- ： Bonfire					： Heavy Blade 3 ： Renewal 3 ： Goad Dragons ：-
Reinforcements 1 Cleric		HP 50		Atk 47		Spd 34		Def 25		Res 42
		： Melancholy+ ： Recover+ ： Heavenly Light					： HP/Atk 2 ： Live to Serve 3 ： Distant Guard 3 ：-

Turn 3 Reinforcements

Reinforcements 2 Green Thief		HP 56		Atk 49		Spd 45		Def 18		Res 39
		： The Cleaner+ ：- ： Draconic Aura					： Attack/Res 2 ： Odd Pulse Tie 3 ： Def Ploy 3 ：-
Reinforcements 2 Bow Cavalier		HP 57		Atk 54		Spd 28		Def 27		Res 25
		： Shining Bow+ ：- ： Miracle					： Mirror Strike 2 ： Lull Atk/Res 3 ： Panic Smoke 3 ：-

Turn 4 Reinforcements

Reinforcements 3 Sword Cavalier		HP 57		Atk 45		Spd 22		Def 31		Res 33
		： Brave Sword+ ：- ： Luna					： Atk/Def Form 3 ： Bowbreaker 3 ： Threat. Atk/Def 2 ：-
Reinforcements 3 Red Flier		HP 48		Atk 51		Spd 48		Def 12		Res 30
		： Rauðrfox+ ：- ： Moonbow					： Life and Death 3 ： Desperation 3 ： Spd/Res Rein 3 ：-

Seiros: Saint of Legend Strategy

Use Units With Skills That Take Out Reinforcements Quickly

Because there are several reinforcements that appear in this map, having units with skills that will help take out as many reinforcements as possible will be a big help.

Having a dancer, using a skill like Galeforce, or using mobility skills like Aerobatics 3 or Armor March 3 can all be utilized in quickly clearing the map.

Have Dragon-Effective and Flying-Effective Weapons

Several enemy units are either flying or are dragons, so it's best to have units that have weapons that are effective against these types.

Have Fliers On Your Team

The space to move your units is a little limited, so having flying units will open up to more strategy and opportunities for mobility.

You can also utilize flier skills that will help your team reposition themselves.

Useful Flier Mobility Skills
Wings of Mercy 3	Escape Route 3	Aerobatics 3	Flier Formation 3
Guidance 3	Air Orders 3	Ground Orders 3	Flier Guidance 3

Recommended Units for Seiros: Saint of Legend

Units With Brave Weapons

Unit Name
Legendary Leif	Colorless Bow Cavalry Weapon allows him to attack twice. Special allows him to take an additional action.
Ninja Lyn	Colorless Dagger Flier Weapon allows her to attack twice. Duo Skill grants her another action.
Klein	Colorless Infantry Bow Weapon allows him to attack twice Effective against flying units.
Gordin	Colorless Infantry Bow Weapon allows him to attack twice Effective against flying units.

Tanky Units That Can Counterattack Regardless of Distance

Unit Name
Legendary Ike	Sword Infantry His Special heals him. Easy to obtain unit.
Sothis	Red Infantry Breath Her Special heals her. Her Special can be charged easily due to her kit and heals her.
Brave Hector	Lance Armored Guaranteed follow-up attack. Immune against armor-effective weapons.
New Year Alfonse	Blue Infantry Tome His Special can be charged easily. His weapon prevents follow-up attacks from enemy units.
Brave Edelgard	Axe Armored Strong stats and skills all around.
Winter Sothis	Green Armored Breath Her Special can be charged easily due to her kit and heals her.
Fallen Tiki (Young)	Colorless Armored Breath Armored unit that can move 2 spaces. Her Special can be charged easily.
Caineghis	Colorless Armored Beast Can make a guaranteed follow-up attack Nullifies buffs from ranged units.

High Power Units

Unit Name
Reginn	Sword Cavalry Can move after attacking or using an assist skill. Powerful exclusive Special.
Altina	Sword Flier Can attack twice with her weapon and counterattack regardless of range.
Reinhardt	Blue Cavalry Tome Can attack twice with his weapon. Easy to obtain unit.
Ophelia	Blue Infantry Tome Her Special is easy to charge and can hit multiple units.
Legendary Celica	Green Infantry Tome Very high firepower that can double because of her high spd.
Nino	Green Infantry Tome Blade weapon with high firepower. Easy to obtain unit.
Pirate Tibarn	Colorless Beast Flier Guaranteed follow-up attack with his weapon. Can move 3 spaces when he transforms.

Recommended Dancer Units

Unit Name
Flying Olivia	Sword Flier Grants buffs to ally that she dances.
Peony	Blue Tome Flier Her skills grants powerful buffs. Her kit provides good mobility.
Legendary Azura	Blue Tome Flier Extreme strong refresher skill Grants flying and infantry allies +1 movement space when she uses her Sing skill.
Reyson	Green Beast Flier Can move 3 spaces when he transforms. Easy to obtain unit.

List of All Dancers | Heroes with Refresher Skills

Seiros: Saint of Legend Abyssal Strategy Example

Currently Unavailable!

An Abyssal strategy example for Seiros: Saint of Legend is currently unavailable. Stay tuned!

User Submitted Parties for Seiros: Saint of Legend

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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