Idunn Builds and Best IVs

This is a ranking page for the hero Idunn - Dark Priestess 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 Idunn.

Heroes With the Same Name
Idunn	Spring Idunn
Ascended Idunn

Focus - Fae and Idunn's Battle Featured Heroes
Roy [7.5/10]	Idunn [9.0/10]	Fae [8.0/10]

Idunn Rating and Basic Information

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

Idunn - Dark Priestess: Basic Information

Color / Weapon Type / Move Type	Red / Red Breath / Armored
Rarity	5 Star
What Kind of Character Are They?	・One of the few armored dragon units Nullifies enemy penalties cast on her ・Guaranteed follow-up attack when the foe initiates combat

Idunn Skills at 5★

Demonic Breath Might: 16　 Range: 1 Def+3. Effective against armored foes. At start of combat, if a penalty is active on unit, or unit’s HP< 100%, neutralizes penalties on unit and grants Atk/Spd/Def/Res+4 in combat. Calculates damage using the lower of foe’s Def & Res if foe’s range=2

Bonfire Cooldown Count = 3 Boosts damage dealt by 50% of unit’s Def.

Fort. Def/Res 3 Grants Def/Res +6. Inflicts Atk -2.

Vengeful Fighter 3 If unit’s HP ≥ 50% and foe initiates combat, unit makes a guaranteed follow-up attack. Grants Special cooldown charge +1 per attack. (Does not stack. )

Ward Dragons Grants Def/Res+4 to dragon allies within 2 spaces during combat.

Idunn Best IVs

Recommended IVs

Stat	Superboon/Superbane	IV Recommendation
HP (19)		★★☆☆☆
Atk (27)		★★★☆☆
Spd (4)		★★☆☆☆
Def (12)		★★★★☆
Res (4)		★★★★★

◯ = 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.

+Res/-Spd

Idunn's best IVs are +Res and -Spd. With a super boon in Res, an asset in this stat gives Idunn +4 Res, making her an incredible magic wall. As a bane, HP or Spd are ideal. A Spd bane will increase the follow-up attacks she receives, but speed up her special cooldown quicker.

Idunn Best Builds

Dragon Wall Near Save Idunn

HOT
： Demonic Breath ： Swap ： Bonfire ： -	： Fort. Def/Res 3 ： Dragon Wall 3 ： D/R Near Save 3 ： Quick Riposte 3 ： -

How to Use, Explanation

This build uses Near Save to protect Idunn's allies from melee attacks. Dragon Wall is used to reduce incoming damage, while Quick Riposte provides a guaranteed follow-up attack.

Dual Phase Idunn

： Demonic Breath ： Pivot ： Bonfire ： -

： Distant Counter ： Bold Fighter 3 ： Armor March 3 ： Quick Riposte 3 ： -

How to Use, Explanation

This build revolves around inheriting Distant Counter so Idunn can counterattack from any range. With Bold Fighter in the B slot, Idunn can get guaranteed follow-up attacks when initiating combat, and through Quick Riposte, when the foe initiates combat as well. In the C slot, we chose Armor March to raise her mobility.

Source Heroes for All Skills

Idunn Best Weapon Refine

Effect of Idunn's Refined Weapon

Exclusive Weapon Effect from Refining (Special Effect Type)
Demonic Breath	SP: 400
Might: 16　Range: 1　HP: 3 Grants Def+3. Effective against armored foes. If foe initiates combat, if a negative status effect is active on unit at start of combat, or if unit's HP < 100% at start of combat, neutralizes penalties on unit and grants Atk/Spd/Def/Res+4 during combat. If foe's Range = 2, calculates damage using the lower of foe's Def or Res. If foe initiates combat or if foe's HP ≥ 75% at start of combat, grants Atk+5 to unit, inflicts Atk-5 on foe, and also, if foe can make a follow-up attack, reduces damage from foe's first attack by 70% during combat. ：500　：200

We recommend the Special Effect Refine for Demonic Breath

Refined Demonic Breath grants Idunn bonus Atk, reduces her foe's Atk, and grants a massive 70% damage reduction if her foe can make a follow-up attack.

This refine turns Idunn into a very potent wall that can withstand multiple blows from her enemies.

Idunn Stats

Stat Rankings

Neutral Stats at Lv. 40 (5★)
179
HP	45	Rank: 107/1171
Atk	35	Rank: 736/1171
Spd	26	Rank: 910/1171
Def	39	Rank: 113/1171
Res	34	Rank: 239/1171

Stat Values

Lv 40+10 Stats (5★)

	HP	Atk	Spd	Def	Res	Total
+10 Merges W/ Skill Bonuses	50	54	30	53	44	231
Lv.40 +10	50	40	30	44	38	202

Stats at Lv 40

	HP	Atk	Spd	Def	Res	Total
5★- Adjusted for Skills	45	49	26	48	40	208
5★ Lv.40	45	35	26	39	34	179

Initial Stats (with Skills)

	HP	Atk	Spd	Def	Res	Total
5★ Lv.1	19	27	4	12	4	66

Stat Comparison of Similar Heroes

Hero	HP	Atk	Spd	Def	Res	Total
Halloween Nagi	49	48	17	45	48	207
Halloween Duma	47	46	19	40	43	195
Spring Idunn	46	37	26	37	38	184
Dheginsea	45	45	14	41	39	184
Halloween Myrrh	46	38	23	40	32	179
Idunn	45	35	26	39	34	179

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

Idunn Roles, Strengths, and Weaknesses

Idunn Roles

Idunn - Dark Priestess Roles
Close-Physical	Ranged-Physical	Close-Magic	Ranged-Magic
Physical Wall	Magic Wall	Effective Weapon	Movement Assist
Exclusive Skill	All-Range Counter	Recovery	Refresher
Legendary	Mythic	Duo / Harmonized	Resplendent

Idunn is a non-ranged (Range = 1) magic attacker. Therefore, when not accounting for the Weapon Triangle, the amount of damage she deals will be equivalent to her Atk minus the foe's Res stat.

Idunn Strengths

Demonic Breath has useful effects

Idunn's unique weapon Demonic Breath provides some useful effects that function both offensively and defensively.

Below is a summary of its effects:

1	Grants Def+3
2	Effective against armored foes
3	Neutralizes penalties on Idunn, if a penalty is active on her or her HP < 100%
4	Grants Idunn Atk/Spd/Def/Res+4 during combat, if a penalty is active on her or her HP < 100%
5	Calculates damage using the lower of foe's Def or Res, if foe's Range = 2

Can play a support role in a Dragon party

Even among other armored manaketes, Idunn is exceptionally powerful, and she can excel as a pivotal member in both all armor or all dragon teams. Since she learns Ward Dragons by default, she can easily buff the defensive power of other dragons in her team to play a support role.

Bold Fighter and Vengeful Fighter are both very powerful on Idunn!

As an armor unit, equipping skills like Bold Fighter and Quick Riposte as Sacred Seals will allow her to gain follow-up attacks regardless of who initiates combat. However, Bold Fighter is quite a high investment skill, and Vengeful Fighter alone is quite powerful as is, so do not waste extremely valuable skills unless necessary.

Works well with teammates who have movement skills

In a Dragon party, Idunn will often be slowed by her low mobility, so having a teammate with Armor March or Guidance on the same team will make it easier for her to get up and close to the foes. Guidance is also available as a Sacred Seal.

Idunn Weaknesses

Watch out for enemy follow-up attacks! Do not overestimate her defensive power

Although Idunn's defensive stats are very high, her Spd is slow, meaning she will often take follow-up attacks, and if taken from a blue unit, that damage will add up quickly. In particular, Idunn does not have Distant Counter by default, so a speedy blue ranged unit can deal plenty of damage to Idunn. Units like Micaiah who have effective weapons, and speedy attackers like Ishtar are equipped to take Idunn down, so know your enemy's unit types, and let her allies take out foes she struggles with.

Idunn Team and Counters

Teammates for Idunn

Brave Hector	Ninian	Legendary Tiki (Young)	Nils
Fallen Ninian	Nagi	Medeus	Fallen Rhea

Units that can boost Idunn's mobility

Idunn is an armored unit, so naturally she can only move one space per action. A unit with Armor March can assist her with this, as well as other skills such as Guidance. Having a refresher unit on your team will always be a plus for Idunn.

Units who can effectively take down blue attackers

Despite her high defensive stats, one powerful attack from a blue unit can sometimes be enough to take Idunn down. Heavy hitting units like Ophelia can OHKO Idunn, so pair her with a strong green unit like Nagi to take care of this type of enemy for her.

Idunn Counters

Legendary Marth	Brave Alm	Est	Ophelia
Naga	Legendary Julia	Legendary Chrom	Legendary Micaiah

Units with armor/dragon effective weapons

As an armored dragon unit, Idunn has two weaknesses, so units with dragon/armor-effective weapons can quickly take Idunn down. In particular, Legendary Marth is a certified Dragon Slayer, so you must avoid an attack from him at all costs.

Should you Unlock Potential?

Should You Unlock Potential for this Hero?	Cannot Unlock Potential

Idunn - Dark Priestess Only Appears as a 5 Star Hero!

Idunn - Dark Priestess only appears as a 5 Star Hero. We will include whether or not you should Unlock Potential for Idunn - Dark Priestess if a 4 Star version is released!

Unlock Potential Tier List

Idunn - List of Skills

Weapons

Skill Name	Might	Range	Effect	Learned At
Fire Breath	6	1	No Effect	5★
Fire Breath+	8	1	No Effect	5★
Flametongue	11	1	No Effect	5★
Demonic Breath	16	1	Def+3. Effective against armored foes. At start of combat, if a penalty is active on unit, or unit’s HP< 100%, neutralizes penalties on unit and grants Atk/Spd/Def/Res+4 in combat. Calculates damage using the lower of foe’s Def & Res if foe’s range=2	5★

Assists

This Hero has no Assist skills that can be learned.

Specials

Skill Name	Effect	Learned At
Glowing Ember	(Cooldown Count = 4) Boosts damage dealt by 50% of unit’s Def.	5★
Bonfire	(Cooldown Count = 3) Boosts damage dealt by 50% of unit’s Def.	5★

Passives

Skill Name	Effect	Learned At
Fortress Def 1	Grants Def +3. Inflicts Atk -3.	5★
Fort. Def/Res 1	Grants Def/Res +3. Inflicts Atk -3.	5★
Fort. Def/Res 2	Grants Def/Res +4. Inflicts Atk -3.	5★
Fort. Def/Res 3	Grants Def/Res +6. Inflicts Atk -2.	5★
Vengeful Fighter 1	If unit’s HP ≥ 90% and foe initiates combat, unit makes a guaranteed follow-up attack. Grants Special cooldown charge +1 per attack. (Does not stack. )	5★
Vengeful Fighter 2	If unit’s HP ≥ 70% and foe initiates combat, unit makes a guaranteed follow-up attack. Grants Special cooldown charge +1 per attack. (Does not stack. )	5★
Vengeful Fighter 3	If unit’s HP ≥ 50% and foe initiates combat, unit makes a guaranteed follow-up attack. Grants Special cooldown charge +1 per attack. (Does not stack. )	5★
Spur Def 1	Grants adjacent allies Def +2 during combat.	5★
Spur Def 2	Grants adjacent allies Def +3 during combat.	5★
Ward Dragons	Grants Def/Res+4 to dragon allies within 2 spaces during combat.	5★

Idunn as a Source Hero

Value of Skills	★★★★★

Inheriting Fort. Def/Res 3 or Vengeful Fighter 3

Idunn can be used to inherit the skills Fort. Def/Res 3 or Vengeful Fighter 3. However, Idunn is a rare and extremely powerful armored dragon unit, so we highly recommend keeping and building at least one before foddering of or merging any duplicates. In addition, she works great in both dragon and armor parties.

List of Source Heroes

The Top Source Heroes

How to Get Idunn / Illustrations / Voice Actor / Quotes

How to Get Idunn

Obtain Through Regular Summon

Idunn is a Hero who can be pulled from any summon.

Note: Not currently a featured hero in any Summon events.

Current Focuses and Which You Should Pull From

Voice Actor and Illustrator Information

Voice Actor (English)	Sarah Blandy
Illustrator	Yamada Kotaro (山田孝太郎)
Appears In	Fire Emblem: The Binding Blade

Illustration

Quotes: Special Triggered

Special Triggered Quotes are voice lines that play upon activating a Special attack.

Lv 40 5★ Dialogue

Lv 40 5★ Dialogue become available when a hero attains Lv. 40 at 5★ rarity.

FEH: Related Guides

Focus: Fae and Idunn's Battle

Heroes from Focus - Fae and Idunn's Battle
Roy [7.5/10]	Idunn [9.0/10]	Fae [8.0/10]

See All Red Heroes

▶︎Return to the Red Heroes Page

All Types of Red Weapons

Close-Range	Ranged
Sword	Red Tome
Red Breath	Red Dagger
Red Beast	Red Bow