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Fire Emblem Heroes (FEH)

Fáfnir Builds and Best IVs

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FEH Fáfnir Banner

This is a ranking page for the hero Fáfnir - King of Desolation from the game Fire Emblem Heroes (FEH). Read on to learn the best IVs (Individual Values), best builds (Inherit Skill), weapon refinement, stats at Lv 40, and more for Fáfnir.

Heroes With the Same Name
Fáfnir - Fresh Ambition Icon New Year Fáfnir
Fáfnir - King of Desolation Icon Fáfnir

List of Contents


Fáfnir Rating and Basic Information

Overall Rating 9.0/10
Reroll Ranking (excluding Inherit Skill) -
(▶Reroll Ranking)
Ranking (including Inherit Skill) A
(▶FEH Tier List)

Fáfnir - King of Desolation: Basic Information

Color / Weapon Type / Move Type
Blue IconBlue / Lance IconLance / Cavalry IconCavalry
Rarity
4 Star Icon4 Star 3 Star icon3 Star
What Kind of Character Are They? ・Free-to-Play hero with great mobility and offensive stats.
・Iron Hreiðmarr grants 【Canto (Dist. +2; Max 5)】 during turns 1 through 4, inflicts stat penalties and a Guard effect onto foes within 3Rx3C, makes foes within 3Rx3C suffer guaranteed follow-up attacks, grants Fáfnir bonus stats, bonus true damage, and bonus Special cooldown charges before first attack.

Fáfnir Skills at 5★

Lance IconIron Hreiðmarr
Might: 16　 Range: 1
Grants Atk+3.
Enables 【Canto (Dist. +2; Max 5)】 during turns 1 through 4.
For foes within 3 rows or 3 columns centered on unit, inflicts Atk/Spd/Def-5, inflicts Special cooldown charge -1 on foe per attack (only highest value applied; does not stack), and those foes suffer guaranteed follow-up attacks during combat.
At start of combat, if unit's HP ≥ 25%, grants bonus to unit's Atk/Spd/Def/Res = number of foes within 3 rows or 3 columns centered on unit × 3 (max 9), deals damage = 15% of unit's Atk (excluding area-of-effect Specials), and grants Special cooldown count-X to unit before unit's first attack during combat (X = number of spaces from start position to end position of whoever initiated combat, max 3).
Special Skill IconDragon Fang
Cooldown Count = 4
Boosts Atk by 50%.
Lull Spd/Def 3Lull Spd/Def 3
Inflicts Spd/Def-3 on foe and neutralizes foe's bonuses to Spd/Def (from skills like Fortify, Rally, etc.) during combat.
Rouse Atk/Spd 3Rouse Atk/Spd 3
At start of turn, if unit is not adjacent to an ally, grants Atk/Spd+6 for 1 turn.

Fáfnir Best IVs

Recommended IVs

Stat Superboon/Superbane IV Recommendation
HP (18) HP Superbane ★★★☆☆
Atk (9) Attack Boon ★★★★★
Spd (12) No Spd IV ★★★★★
Def (11) No Def IV ★★★☆☆
Res (3) No Res IV ★☆☆☆☆

◯ = Stat gains +4 with a superboon, ✕= Stat goes down by -4 with a superbane, - = No assets or flaws

See the IV Checker for All Units Trait Fruits—How to Change IVs

When using an Ascendant Floret, we recommend getting the next superboon if it fits the hero. If not, consider what stat your hero needs most.

Neutral IVs by default!

As a hero obtainable only through Grand Hero Battle, Fáfnir will always have neutral IVs by default. The only way to access IVs for this unit is through using Trait Fruits.

+Spd / -Res

The best IVs for Fáfnir are +Spd and -Res. Fáfnir's Spd is among the highest in the game at base 47, and can be raised to base 50 with a boon. With a Spd boon and equal investment, Fáfnir can prevent the fastest metagame foes from generating follow-up attacks against him.

Fáfnir's Res is a clear dump stat at only base 18 and can be safely taken as a bane.

+Spd for a +10 merge

We recommend +Spd when merging Fáfnir up to +10 to ensure he outspeeds a majority of the metagame while preventing the fastest fully merged units from generating follow-up attacks against him.

Fáfnir Best Builds

Potent Offensive Fáfnir

HOT
Weapon Skill Icon： Iron Hreiðmarr
Assist Skill Icon： Reposition
Special Skill Icon： No Quarter
Emblem Icon： Emblem Sigurd
Passive Skill A Icon： Atk/Spd Excel
Passive Skill B： Potent 4
Passive Skill C： Fatal Smoke 4
Sacred Seal Icon： Atk/Spd Clash 3
Attuned Skill Icon： -
Updated on 05/07/2025

How to Use, Explanation

This is an offensive build catered to having Fáfnir attack multiple times to burst down his foes. Emblem Sigurd is used for additional movement and to provide Canto after turn 4.

Source Heroes for All Skills

Fáfnir Stats

Stat Rankings

Neutral Stats at Lv. 40 (5★)
190
HP
HP 40 40
 Rank: 522/1317
Atk
Atk 48 48
 Rank: 10/1317
Spd
Spd 47 47
 Rank: 26/1317
Def
Def 37 37
 Rank: 178/1317
Res
Res 18 18
 Rank: 1145/1317

Stat Values

Lv 40+10 Stats (5★)

HP Atk Spd Def Res Total
+10 Merges W/ Skill Bonuses 45 71 52 42 22 232
Lv.40 +10 45 52 52 42 22 213

HP Atk Spd Def Res Total
+HP
Lv.40 +10		 47 52 51 41 22 213
+Atk
Lv.40 +10		 44 56 51 41 22 214
+Spd
Lv.40 +10		 44 52 54 41 22 213
+Def
Lv.40 +10		 44 52 51 44 22 213
+Res
Lv.40 +10		 44 52 51 41 25 213

Stats at Lv 40

HP Atk Spd Def Res Total
5★- Adjusted for Skills 40 67 47 37 18 209
5★ Lv.40 40 48 47 37 18 190
4★ Lv.40 37 35 35 35 14 156
3★ Lv.40 36 34 33 33 13 149

Initial Stats (with Skills)

HP Atk Spd Def Res Total
5★ Lv.1 18 28 12 11 3 72
4★ Lv.1 17 18 11 9 2 57
3★ Lv.1 17 15 10 8 2 52

Stat Comparison of Similar Heroes

Hero
 HP
 Atk
 Spd
 Def
 Res
 Total
Fáfnir Icon Fáfnir
40 48 47 37 18 190
Kyle Icon Kyle
41 47 31 45 21 185
Mauvier Icon Mauvier
42 44 18 46 35 185
Matthis Icon Matthis
41 43 32 38 25 179
Spring Luthier Icon Spring Luthier
41 38 36 31 27 173
Valentine Valentine's Owain
41 38 42 31 21 173
Roshea Icon Roshea
41 38 35 38 21 173
Petrine Icon Petrine
42 35 37 30 24 168
Ferdinand Icon Ferdinand
41 32 35 30 24 162
New Year Laegjarn Icon New Year Laegjarn
38 32 35 35 17 157
Finn Icon Finn
40 34 33 32 18 157
Camus Icon Camus
42 32 33 31 17 155
Abel Icon Abel
39 33 32 25 25 154
Oscar Icon Oscar
40 33 34 26 21 154
Sully Icon Sully
42 26 34 24 28 154
Peri Icon Peri
35 33 33 23 30 154
Roderick Icon Roderick
40 31 34 25 24 154

Note: Stats bonuses from skills are not taken into account.

Fáfnir Roles, Strengths, and Weaknesses

Fáfnir Roles

Fáfnir - King of Desolation Roles
Close Physical Attack ImageClose-Physical Ranged Physical AttackRanged-Physical Close Magic AttackClose-Magic Ranged MagicRanged-Magic
Physical Wall ImagePhysical Wall Magic WallMagic Wall Effective ImageEffective Weapon Movement Assist ImageMovement Assist
Exclusive Skill ImageExclusive Skill No All Range Counterattack ImageAll-Range Counter RecoveryRecovery No Refresher ImageRefresher
No Legendary Hero ImageLegendary No Mythic Hero ImageMythic No Duo and Harmonized ImageDuo /
Harmonized		 No Resplendent ImageResplendent

Fáfnir is a close physical attacker (range = 1). Therefore, when not accounting for the Weapon Triangle, the amount of damage he deals will be equivalent to his Atk minus the foe's Def stat.

Fáfnir Strengths

Iron Hreiðmarr has Canto and Provides Support

Fáfnir's Iron Hreiðmarr grants him 【Canto (Dist. +2; Max 5)】 during turns 1 through 4, making him a hero meant to rush down enemies before the Canto effect expires.

Iron Hreiðmarr also inflicts Atk/Spd/Def-5 and Special cooldown charge -1 on foe per attack for all foes within 3 rows or 3 columns of Fáfnir, and those foes also suffer guaranteed follow-up attacks in combat. This effect has a wide range, allowing Fáfnir to support his team from across the map.

In combat, Iron Hreiðmarr grants Fáfnir up to Atk/Spd/Def/Res+9, bonus true damage equal to 15% of his Atk, and bonus Special cooldown charges before his first attack based on distance travelled (up to Special cooldown count -3).

Iron Hreiðmarr has great offensive effects, from the superior early game Canto to the Special cooldown reduction. This weapon is ideal for rushing strategies where clearing the map quick is the main strategy.

Fáfnir Weaknesses

Low Res

Fáfnir only has base 18 Res, and with no true damage reduction on Iron Hreiðmarr, magic damage will most likely defeat Fáfnir in one round.

Keep him away from foes that deal magic damage to ensure his survival.

Weak to Cavalry Effective Weapons

Fáfnir takes 1.5x damage from cavalry-effective weapons like Thani or Binding Reginleif, and one blow from this type of weapon will deal significant damage. Make sure you know what weapons you are up against before hopping too far into the line of battle!

Heroes with Effective Skills

Should you Unlock Potential?

Should You Unlock Potential for this Hero? A Rank Icon

We Recommend You Unlock Potential for Fáfnir - King of Desolation!

We recommend that you use Unlock Potential to bring Fáfnir - King of Desolation from 4 Stars to 5 Stars. Fáfnir - King of Desolation is a very useful fast lance cavalry, so we recommend you Unlock Potential for Fáfnir - King of Desolation if your team lacks a strong fast lance cavalry.

Unlock Potential Tier List

Fáfnir - List of Skills

Weapons

Skill Name Might Range Effect Learned At
LanceIron Lance
6 1 No Effect 3★
LanceSteel Lance
8 1 No Effect 3★
LanceSilver Lance
11 1 No Effect 3★
LanceIron Hreiðmarr
16 1 Grants Atk+3.
Enables 【Canto (Dist. +2; Max 5)】 during turns 1 through 4.
For foes within 3 rows or 3 columns centered on unit, inflicts Atk/Spd/Def-5, inflicts Special cooldown charge -1 on foe per attack (only highest value applied; does not stack), and those foes suffer guaranteed follow-up attacks during combat.
At start of combat, if unit's HP ≥ 25%, grants bonus to unit's Atk/Spd/Def/Res = number of foes within 3 rows or 3 columns centered on unit × 3 (max 9), deals damage = 15% of unit's Atk (excluding area-of-effect Specials), and grants Special cooldown count-X to unit before unit's first attack during combat (X = number of spaces from start position to end position of whoever initiated combat, max 3).		 5★

Assists

This Hero has no Assist skills that can be learned.

Specials

Skill Name Effect Learned At
Special SkillDragon Gaze
 (Cooldown Count = 4) Boosts Atk by 30%. 3★
Special SkillDragon Fang
 (Cooldown Count = 4) Boosts Atk by 50%. 4★

Passives

Skill Name Effect Learned At
Lull Spd/Def 1 IconLull Spd/Def 1
 Inflicts Spd/Def-1 on foe and neutralizes foe's bonuses to Spd/Def (from skills like Fortify, Rally, etc.) during combat. 3★
Lull Spd/Def 2 IconLull Spd/Def 2
 Inflicts Spd/Def-2 on foe and neutralizes foe's bonuses to Spd/Def (from skills like Fortify, Rally, etc.) during combat. 4★
Lull Spd/Def 3 IconLull Spd/Def 3
 Inflicts Spd/Def-3 on foe and neutralizes foe's bonuses to Spd/Def (from skills like Fortify, Rally, etc.) during combat. 5★
Rouse Atk/Spd 1 IconRouse Atk/Spd 1
 At start of turn, if unit is not adjacent to an ally, grants Atk/Spd+2 to unit for 1 turn. 3★
Rouse Atk/Spd 2 IconRouse Atk/Spd 2
 At start of turn, if unit is not adjacent to an ally, grants Atk/Spd+4 to unit for 1 turn. 3★
Rouse Atk/Spd 3 IconRouse Atk/Spd 3
 At start of turn, if unit is not adjacent to an ally, grants Atk/Spd+6 for 1 turn. 4★

Fáfnir as a Source Hero

Fáfnir Avatar

Value of Skills ★★☆☆☆

Fáfnir has Lull Spd/Def 3 and Rouse Atk/Spd 3 as inheritable options.

We recommend merging your Fáfnir copies instead.

List of Source Heroes The Best Fodder Units

Community Feedback

How would you rate Fáfnir?

Top tier hero. Must promote and merge. 8
Votes
Promote if you need his/her archetype. 0
Votes
Promote to 5 stars if you like this hero. 1
Votes
Summon for his/her Skill Inheritance options. 0
Votes
Pass on this hero. 2
Votes

If you have feedback about this hero page, let us know in the comments section below!

How to Get Fáfnir / Illustrations / Voice Actor / Quotes

How to Get Fáfnir

Obtain through a Grand Hero Battle

Fáfnir is a Hero who, for a limited time, can be obtained through completing a Grand Hero Battle for the first time. They do not appear in regular summons. After the event has ended, they can be obtained by using Heroic Grails.

Voice Actor and Illustrator Information

Voice Actor
(English)		 Griffin Poatu
Illustrator Kozaki Yusuke
Appears In
Fire Emblem Heroes

Illustration

Fáfnir.png
Fáfnir.png
Fáfnir.png
Fáfnir.png

FEH: Related Guides

See All Blue Heroes

Back to Blue Heroes Banner

▶︎Return to the Blue Heroes Page

All Types of Blue Weapons

Close-Range Ranged
LanceLance Blue TomeBlue Tome
Blue BreathBlue Breath Blue DaggerBlue Dagger
Blue BeastBlue Beast Blue BowBlue Bow

Comment

3 Anonymous Anonymous@Game8 7 months

You're right; Fáfnir shouldn't have a reroll ranking since he's obtainable for free. We've fixed the article.

2 twztid13 twztid13 7 months

best, not beat*

See more comments (3 Comments)

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