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From Fire Emblem Wiki, your source on Fire Emblem information. By fans, for fans.

FESS Fomortiis.png
Artwork of Fomortiis from The Sacred Stones.

The Demon King, lord of darkness. His sole desire is to remake the world.


Genderless[1] (referred to as male by other characters)




Demon King

Starting class

Demon King


The Sacred Stones

Oh, please... Are you done turning your failings into some sad epic of personal tragedy? It's time we started then. I have a ritual to complete...and some nuisances to kill.
— Fomortiis

Fomortiis (Japanese: フォデス, Fodeth[2]), is the final boss and the true main antagonist of Fire Emblem: The Sacred Stones who is usually referred as the Demon King. Eight hundred years before the events of the game, he was defeated by the Five Heroes, their Sacred Twin weapons and the Sacred Stones.

Fire Emblem: The Sacred Stones


The Demon King is mentioned in the prologue as having been defeated and sealed away in the Sacred Stones. However, in Chapter 4, horrific monsters appear, the same as those from legends of old. They are described as having served the ancient Demon King, a sign of his resurrection.

Another mention of the Demon King occurs in Chapter 10 of Ephraim's route, in which Duessel speaks of a "Dark Stone" created by Prince Lyon and the other court mages, even more powerful than the Sacred Stones. Ephraim notes they had the power to defeat the Demon King, implying this Dark Stone's great might. In the next chapter, Riev appears on the phantom ship, which holds many monsters, and seems to be celebrating the Demon King's rebirth.

The Demon King's role is fully revealed late in the game: sometime before a year before the beginning of the game, Lyon began to research the properties of Grado's Sacred Stone, also known as the Fire Emblem, which had contained the sealed soul of the Demon King. However, a year before the start of the story, the Emperor Vigarde died to illness, leaving Lyon in a heavily panicked state. He began to work tirelessly to research the stone to find a way to revive him. Additionally, some time before the emperor's death, Lyon and the mages had seen a vision of the entire southern continent collapsing; a generally enormous catastrophe.

Somehow, the Stone was broken in two: the original Sacred Stone and the Dark Stone. The former was later destroyed by Lyon. At that moment, the Demon King called out to Lyon, convincing him that his wishes will be granted—the love of Eirika and the safety of his people. The Demon King begins to corrupt Lyon's body. He uses Lyon to control Vigarde and Grado's Imperial army, and sends them to destroy the rest of the Sacred Stones so that he can return to power without the threat of being sealed away once again.

By the end of the game, Lyon meets Eirika and Ephraim again, changed greatly. In Eirika's route, he convinces her to give him the stone, then abruptly changes back to his evil form and destroys it; in Ephraim's route, he freezes Ephraim in place and forcefully takes it. In the end, he travels to the Black Temple to finalize the Demon King's resurrection. Lyon dies and the Demon King appears.

First, his soul is trapped in the Sacred Stone of Rausten. However, his body still remains to be fought. The Demon King is the final boss of the game; only in this battle is he actually referred to as "Fomortiis", and only in his status screen. After he is defeated, peace returns to the continent of Magvel. The calamity predicted by Lyon and the other mages does happen, with a huge landslide killing thousands. Ephraim decides to travel there, to help Lyon's vision of a peaceful world, and to help the people.


See also: Sacred Stone (part 2)
Stats with two figures separated by a ~ are presented as a range, representing stats that vary due to random growths. The figures to the left and right of the ~ are the stat's minimum and maximum possible values respectively.

Easy/Normal Difficult

Generic portrait demon king fe08.png
Ma gba demon king enemy.gif Demon King
Level 20
Affinity Is gba darkaffin.png
Max HP 120 Luck 10+10
Strength 23+10 Defense 25+10
Skill 20+10 Resistance 25+15
Speed 18 Constitution 25
Movement 2 Aid 24
Demon Light
Weapon Levels
Swords -- Lances -- Axes -- Bows --
Anima magic -- Light magic -- Dark magic -- Staves --

Fire Emblem Heroes

Fomortiis is the game's thirtieth Mythic Hero, and was added to the game in a dedicated Mythic Hero update, made available for summoning as part of a summoning event alongside Gotoh released on January 27, 2023. Only one variation of Fomortiis is currently available in Heroes, based on his The Sacred Stones incarnation; he uses Lyon as his untransformed sprite.

Fomortiis additionally appears as a manifestation for the attacking animation of the corrupted Lyon's Blood Tome.

Fomortiis: Demon King

Starting stats

Fomortiis: Demon King is only available at 5★ rarity.
Portrait fomortiis demon king feh.png
Rarity ★★★★★
Weapon type Is feh colorless beast.png
Movement type Armor
Mythic Hero
Anima Speed 2

Initial Stats Level 40 Stats

Maximum HP 21/22/23
Attack 13/14/15 Speed 4/5/6
Defense 8/9/10 Resistance 8/9/10
Weapon Ravager
Assist --
Special Glowing Ember

Skill set

Skill set
Skill Unlock Auto-unlock SP cost
Is feh skill weapon.png Whelp (Armored) ★★★★★ ★★★★★ 50
Is feh skill weapon.png Yearling (Arm.) ★★★★★ ★★★★★ 100
Is feh skill weapon.png Adult (Armored) ★★★★★ ★★★★★ 200
Is feh skill weapon.png Ravager ★★★★★ ★★★★★ 400
Is feh skill special.png Glowing Ember ★★★★★ ★★★★★ 100
Is feh skill special.png Bonfire ★★★★★ 200
Is feh nightmare.pngA Nightmare ★★★★★ 300
Is feh beast follow-up 1.pngB Beast Follow-Up 1 ★★★★★ 60
Is feh beast follow-up 2.pngB Beast Follow-Up 2 ★★★★★ 120
Is feh beast follow-up 3.pngB Beast Follow-Up 3 ★★★★★ 240
Is feh a d far save 1.pngC A/D Far Save 1 ★★★★★ 100
Is feh a d far save 2.pngC A/D Far Save 2 ★★★★★ 200
Is feh a d far save 3.pngC A/D Far Save 3 ★★★★★ 300


Fomortiis is a centuries-old demon whose ultimate goal is to be revived and retake the world under his control. During the story, he uses Lyon for this, and is shown to be very skilled at manipulation. In Eirika's route, he pretends to be back to normal "Lyon", and persuades Eirika into giving him the Sacred Stone, which he then destroys.[3] He has great contempt for mankind and seems to wish to destroy the world or somehow rule over it, mockingly telling Eirika and Ephraim's army to prepare for great catastrophe.[4] He is extremely cruel, keeping Lyon only barely alive inside the body just to watch as he kills Eirika.[5] A merciless demon, he is a truly evil villain.


Battle quotes

Do you challenge me? You humans are so inconstant. You've forgotten what it is to fear me.
— Fomortiis in Lyon's body, Chapter 17
Heh heh... Wretched girl. Are you listening, Lyon? Is this truly the girl you loved? Then I will use these hands to tear her limb from limb!
— Fomortiis in Lyon's body, vs Eirika, Chapter 17
Heh heh... What a splendid fool you make. Shall I dress you in a jester's cap? Shall we watch you jape in my demon's court? Lyon is dead. I devoured him. Can you not understand?
— Fomortiis in Lyon's body, vs Ephraim, Chapter 17
Come, and face your death! I'm waiting, you miserable fool. Your corpse will make a perfect offering in my resurrection.
— Fomortiis in Lyon's body, Final Chapter
Hah, do you really think your blade can hurt me? Cut me and see! If you can even hit me, that is.
— Fomortiis in Lyon's body, vs Eirika, Final Chapter

Death quotes

Fomortiis does not have a death quote as the final boss.

— Fomortiis in Lyon's body, Chapter 17
Ha ha...

— Fomortiis in Lyon's body, Final Chapter

Heroes quotes

Main article: Fomortiis/Quotes (Heroes)

Other appearances

Fire Emblem Cipher

Artwork of Lyon, some monsters, and Fomortiis from Fire Emblem Cipher.

Fomortiis is featured on one card in Fire Emblem Cipher. Additionally, he has appeared in the background of three cards, Ephraim's and Eirika's SR combined artwork cards and Lyon's R card, all from set 11.

Fire Emblem Cipher data for Fomortiis
TCGCipher B22-049HN.png Darkness-Ruling Demon King, Fomortiis



"Humans... Lament your fate. Weep for the dead. Despair for the living. Wail and tremble in grief. I am returned."
Attack: 80 Support: 0 Range: 1 Deploy Cost: 5
Class: Demon King Tier: Base Class Change Cost: --
Controlled by Evil: [Special] If no allied "Fomortiis" is present, you may Level Up an allied "Lyon" into this card.
Resurrection of the Demon King: [Trigger] When you Level Up into this unit, you may choose up to 2 Monster cards from your Retreat Area, and deploy them.
A Land Awash With Miasma: [Activate] [Once per turn] [Send 2 cards from your hand to the Retreat Area] Choose up to 2 Monster cards with a Deployment Cost of 3 or lower from your Retreat Area, and add them to your hand.
Card #B22-049HN • Artist: Yoneko
Some card information translation provided by Serenes Forest.
For more detailed strategic information on these cards, see their TCG wiki article on Fomortiis .

Flavor text

Game Text
The Sacred Stones
The Demon King, lord of darkness. His
sole desire is to remake the world.
Dark Emblem from Eirika's realm.
Embodies a being who corrupted
others with foul demonic powers.
The Demon King who once threatened all of
Magvel before being defeated by five heroes
and sealed in the Sacred Stones. Appears in
Fire Emblem: The Sacred Stones.
(登場:『ファイアーエムブレム 聖魔の光石』)

Meet some of the Heroes entries

Fomortiis: Demon King
FEH mth Fomortiis Demon King 01.png FEH mth Fomortiis Demon King 02.png FEH mth Fomortiis Demon King 03.png FEH mth Fomortiis Demon King 04.png
Fomortiis, the Demon King, once cast a long shadow over the continent of Magvel. He led armies of monsters against mankind in a brutal conflict. At the end of that long and violent war, Fomortiis was defeated by a group of Heroes, and his soul was separated from his body and sealed away. Eight hundred years later, however, his will was somehow freed from its imprisonment—and corrupted the mind of Lyon, prince of the empire of Grado! Having assumed the guise of Lyon, Fomortiis led Grado on an aggressive campaign to break the seals that bound him—at which point, the Demon King would be truly reborn!
Closely Associated Characters
Lyon Myrrh {{{Related_name3}}} {{{Related_name4}}} {{{Related_name5}}}
Prince of Grado; not fond of fighting. A childhood friend of Ephraim and Eirika. Fomortiis takes control over his mind. A manakete who is much older than her appearance suggests. She’s shy but oddly attached to Ephraim. A survivor of the manaketes’ battle against Fomortiis long ago. {{{Related_blurb3}}} {{{Related_blurb4}}} {{{Related_blurb5}}}


  • In what is presumably a minor oversight, it is possible for Fomortiis to call Myrrh a human in his generic Chapter 17 boss quote.[6]
  • Fomortiis has a large third eye on his forehead in his appearance on Lyon's Fire Emblem Cipher card. This is possibly inspired by the king of the Fomorians, Balor, who is described as having a destructive eye on his forehead.[7] Fomortiis's appearance in The Sacred Stones does have a round, though not explicitly eyelike, structure on his forehead that he focuses magic into when casting Demon Light.
    • Balor is also known as the king of demons,[7] like Fomortiis.
  • Despite bearing the title of "Demon King" and being a transformation of the male character Lyon, Fomortiis is considered to be a genderless character in Cipher.

Etymology and other languages

Names, etymology, and in other regions
Language Name Definition, etymology, and notes


In Irish mythology, the Fomoiri or Fomorians were a group of sea demons comparable to the Titans of Greek myth. While they were normally terrible and vicious, Ethniu, daughter of Fomoiri leader Balor, married the hero Cian and bore him the son Lugh.[8] May also incorporate French mort "death".



Officially romanized as Fodeth.
















Traditional Chinese




Small portrait monster fe08.png Sprite Gallery Small portrait lyon 02 fe08.png
Generic portrait demon king fe08.pngPortrait lyon 01 fe08.png Demon King Ma gba demon king enemy.gif
Bs fe08 fomortiis demon king.png

Heroes artwork


  1. Fomortiis's card in Fire Emblem Cipher does not have a gender designation.
  2. [1], Fire Emblem Museum[dead link], Retrieved: August 16, 2011
  3. "Lyon: Please...Eirika... I don't want to die yet... I want to live...with you... If I had the Sacred Stone... I could...heal myself... Please...
    Eirika: you, Lyon. I have a stone right here.
    Eirika: You only pretended to be Lyon... You deceived me. Return him! Return Lyon now!
    Lyon (Demon King): Ha ha... Bwah ha ha ha! I love how humans look when they're drowning in despair. Now is the time to be done with this stone.
    " — Lyon possessed by Fomortiis and Eirika in Chapter 18, Fire Emblem: The Sacred Stones
  4. "Now, humans. Lament your fate. Weep for the dead. Despair for the living. Wail and tremble in grief. Grovel in awe and fear. I am returned." — Fomortiis in the second part of the final chapter, Fire Emblem: The Sacred Stones
  5. "Ha ha. Does it hurt? Are you suffering? Oh, but it does not end for you yet. Oh, no. I've left you this one shard of awareness for a reason. I want you to watch yourself as you crush Eirika. You should thank me! Ha ha hah hah hah!" — Fomortiis, possessing and speaking to Lyon, in Chapter 20, Fire Emblem: The Sacred Stones
  6. "Do you challenge me? You humans are so inconstant. You've forgotten what it is to fear me." — Fomortiis' generic boss quote, which can be triggered by Myrrh, Fire Emblem: The Sacred Stones
  7. 7.0 7.1 "Balor is said to be the son of Buarainech and husband of Cethlenn. Also called the king of demons, Balor is described as a giant with an eye in the middle of his forehead. This eye wreaks destruction when opened."Balor, Wikipedia, Retrieved: December 15th 2017
  8. Irish Fomor, Mystical Myth, Retrieved: September 2, 2011
Fire Emblem: The Sacred Stones
Playable characters AmeliaArturColmCormagDozlaDuesselEirikaEphraimEwanFordeFranzGarciaGerikGilliamInnesJoshuaKnollKyleL'ArachelLuteMarisaMoulderMyrrhNatashaNeimiRennacRossSalehSethSyreneTanaTethysVanessa
Creature Campaign characters CaellachFadoGlenHaydenIsmaireLyonOrsonRievSelenaValter
Non-playable characters DaraKlimtMansel
Bosses AiasBanditBazbaBeranBinksBoneBreguetCaellachCarlyleFomortiisGhebLyonMorvaMurrayNovalaO'NeillOrsonPabloRievSaarSelenaTiradoValterVigardeZonta
Background characters GradoLatonaMacGregorMonicaNada Kuya
Sacred Twins and personal weapons AudhulmaExcaliburGarmGleipnirIvaldiLatonaNidhoggRapierReginleifSieglindeSiegmundVidofnir
Chapters Pre-split P: The Fall of Renais • 1: Escape! • 2: The Protected • 3: The Bandits of Borgo • 4: Ancient Horrors • 5: The Empire's Reach • 5x: Unbroken Heart • 6: Victims of War • 7: Waterside Renvall • 8: It's a Trap!A New Journey
Eirika's Route 9: Distant Blade • 10: Revolt at Carcino • 11: Creeping Darkness • 12: Village of Silence • 13: Hamill Canyon • 14: Queen of White Dunes
Ephraim's Route 9: Fort Rigwald • 10: Turning Traitor • 11: Phantom Ship • 12: Landing at Taizel • 13: Fluorspar's Oath • 14: Father and Son
Post-split 15: Scorched Sand • 16: Ruled by Madness • 17: River of Regrets • 18: Two Faces of Evil • 19: Last Hope • 20: Darkling WoodsF: Sacred Stone (part 1part 2)
Locations MagvelCarcino (Caer Pelyn) • Darkling WoodsFrelia (Tower of Valni) • Grado (Renvall) • Jehanna (Jehanna HallLagdou Ruins) • Rausten (Melkaen Coast) • Renais (Za'ha Woods)
Groups, objects and concepts Five heroesGerik's MercenariesImperial ThreeLegend of the Sacred StonesMonstersSacred StonesSacred TwinsWar of the Stones
Lists ChaptersCharactersClasses (Class change) • Hidden treasureItemsScriptsSkillsSupportsWeapons
Related topics Creature CampaignThe Sacred Stones ComicNovelizationList of version differences (Name chart) • Pre-release information (Pre-release buildUnused content) • Sound RoomTimelineWorld map