Fire Emblem Heroes (FEH)

Nyx Builds and Best IVs

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This is a ranking page for the hero Nyx - Rulebreaker Mage 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 Nyx.

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Nyx Rating and Basic Information

FEH Nyx Banner

Overall Rating 8.5/10
Reroll Ranking (excluding Inherit Skill) B
(▶Reroll Ranking)
Ranking (including Inherit Skill) B
(▶FEH Tier List)

Nyx - Rulebreaker Mage: Basic Information

Color / Weapon Type / Move Type
Rarity
What Kind of Character Are They? ・Grants herself buffs to Atk and Spd when HP ≥ 25%
・If initiating combat or if foe uses magic or staff, grants herself 40% damage reduction on foe's first attack and boosts her next attack by the reduced amount

Nyx Skills at 5★


Might: 14  Range: 2
Grants Spd+3. At start of combat, if unit's HP ≥ 25%, grants Atk/Spd+6 to unit during combat, and also, if unit initiates combat or foe initiates combat and uses magic or staff, reduces damage from foe's first attack by 40% and boosts unit's next attack by total damage reduced (by any source, including other skills.) Resets at end of combat.

Cooldown Count = 3
Treats foe's Def/Res as if reduced by 50% during combat.

If unit is not adjacent to an ally, grants Spd/Res+7 during combat.

Disables foe’s skills that guarantee foe’s follow-up attack and foe’s skills that prevent unit’s follow-up attack.

Nyx Best IVs

Recommended IVs

Stat Superboon/Superbane IV Recommendation
HP (17) HP Superboon ★★★☆☆
Atk (12) Attack Boon ★★★★★
Spd (10) Spd Boon ★★★★★
Def (4) No Def IV ★★☆☆☆
Res (6) Res Bane ★★★★☆

◯ = 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.

+Atk/-Def

We recommend a +Atk/-Def IV for Nyx. Her Atk is a superboon and she will benefit greatly from the increased Atk boosting her attacking power together with the return damage from her weapon. Her Def is beyond salvageable, thus taking it as a bane is a safe choice.

+Atk for a +10 Merge

We recommend taking +Atk as your boon of choice when building a +10 merged Nyx. Boosting her burst potential is key in maximizing the use of her weapon.

Nyx Best Builds

FEAR Nyx

Assist Skill IconDraw Back
Special Skill IconMiracle
Emblem Icon: -
Attuned Skill Icon: -

How to Use, Explanation

This gimmicky build relies on pre-charging Nyx's Miracle through Time's Pulse 3 and other special cooldown reduction effects through her allies' support. Nyx's defenses are reduced as much as possible in order to receive the most damage from an enemy's attack. Miracle will keep Nyx alive, and the mitigated damage will be returned to the opponent to kill him/her with a devastating counterattack.

General Use Nyx

HOT
Assist Skill IconDraw Back
Special Skill IconGlimmer
Emblem Icon: -
Attuned Skill Icon: -

How to Use, Explanation

This build maximizes Nyx's Atk and Spd stats to deal as much damage as possible, while relying on Ginnungagap's damage reduction for survival. The dual Atk/Spd Solo skills boost her Atk and Spd together with her weapon's conditional boost. Null Follow-Up ensures that combat relies on a Spd check for Nyx to make a follow-up attack.

Source Heroes for All Skills

Nyx Stats

Stat Rankings

Neutral Stats at Lv. 40 (5★)
165
HP
HP 36 36
Rank: 865/1078
Atk
Atk 42 42
Rank: 123/1078
Spd
Spd 40 40
Rank: 186/1078
Def
Def 19 19
Rank: 816/1078
Res
Res 28 28
Rank: 379/1078

Stat Values

Lv 40+10 Stats (5★)

HP Atk Spd Def Res Total
+10 Merges W/ Skill Bonuses 41 61 48 23 32 205
Lv.40 +10 41 47 45 23 32 188

HP Atk Spd Def Res Total
+HP
Lv.40 +10
44 46 44 23 32 189
+Atk
Lv.40 +10
40 50 44 23 32 189
+Spd
Lv.40 +10
40 46 48 23 32 189
+Def
Lv.40 +10
40 46 44 26 32 188
+Res
Lv.40 +10
40 46 44 23 35 188

Stats at Lv 40

HP Atk Spd Def Res Total
5★- Adjusted for Skills 36 56 43 19 28 182
5★ Lv.40 36 42 40 19 28 165

Initial Stats (with Skills)

HP Atk Spd Def Res Total
5★ Lv.1 17 26 13 4 6 66

Stat Comparison of Similar Heroes

Hero
HP
Atk
Spd
Def
Res
Total
40 43 45 25 30 183
38 41 46 20 32 177
39 44 36 25 32 176
40 38 42 27 24 171
43 40 36 21 31 171
41 38 36 18 38 171
38 37 33 23 35 166
41 37 39 26 23 166
38 36 35 21 36 166
Nyx Icon Nyx
36 42 40 19 28 165
40 40 39 21 25 165
45 35 39 19 27 165
38 30 34 27 23 152
39 35 35 21 21 151
37 33 34 20 26 150
39 32 34 23 20 148
33 34 31 17 33 148
34 32 34 15 32 147

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

Nyx Roles, Strengths, and Weaknesses

Nyx Roles

Nyx - Rulebreaker Mage Roles
Close Physical AttackClose-Physical Ranged Physical AttackRanged-Physical Close Magic AttackClose-Magic Ranged Magic ImageRanged-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

Nyx is a ranged magic attacker (range = 2). 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.

Nyx Strengths

Ginnungagap buffs Nyx, absorbs damage and returns it back to the opponent

Nyx Damage Reduction

Nyx's unique tome Ginnungagap grants her Atk/Spd+6 if her HP ≥ 25%. It also reduces damage from her foe's first attack by 40% if she initiates combat or if she is facing a magic or staff opponent, then boosts her next attack by the amount of damage reduced. This damage reduction effect makes her deceptively tanky and perfect to combat enemy mages or staff units!

Spd/Res Solo 4 further boosts key stats

In addition to her tome's damage reduction, Spd/Res Solo 4 provides an additional Spd/Res+7 bonus to Nyx during combat as long as she is not adjacent to an ally. These bonuses help her prevent follow-up attacks, create a follow-up attack opportunity of her own, and help her resistance to magical attacks from her foes.

Null Follow-Up 3 denies automatic follow-ups and effects that prevent her follow-up attacks

Nyx carries the powerful B skill Null Follow-Up 3. This skill denies her opponents from making automatic follow-up attacks and prevents effects that deny her own follow-up attacks. This turns combat into a Spd check for Nyx to create a follow-up attack of her own, which is beneficial thanks to her bonuses from Ginnungagap and Spd/Res Solo 4.

Nyx Weaknesses

Low Defense

Nyx has a low Def stat of 19 and her other skills do not compensate for this. This leaves her vulnerable to physical attacks from both melee and ranged foes. Make sure to keep her away from these opponents as much as possible.

Should you Unlock Potential?

Should You Unlock Potential for this Hero? Cannot Unlock Potential

Nyx - Rulebreaker Mage Only Appears as a 5 Star Hero!

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

Unlock Potential Tier List

Nyx - List of Skills

Weapons

Skill Name Might Range Effect Learned At
4 2 No Effect 5★
6 2 No Effect 5★
9 2 No Effect 5★
14 2 Grants Spd+3. At start of combat, if unit's HP ≥ 25%, grants Atk/Spd+6 to unit during combat, and also, if unit initiates combat or foe initiates combat and uses magic or staff, reduces damage from foe's first attack by 40% and boosts unit's next attack by total damage reduced (by any source, including other skills.) Resets at end of combat. 5★

Assists

This Hero has no Assist skills that can be learned.

Specials

Skill Name Effect Learned At
(Cooldown Count = 3) Resolve combat as if foe suffered Def/Res -30%. 5★
(Cooldown Count = 3) Treats foe's Def/Res as if reduced by 50% during combat. 5★

Passives

Skill Name Effect Learned At
If unit is not adjacent to an ally, grants Spd/Res+2 during combat. 5★
If unit is not adjacent to an ally, grants Spd/Res+4 during combat. 5★
If unit is not adjacent to an ally, grants Spd/Res+6 during combat. 5★
If unit is not adjacent to an ally, grants Spd/Res+7 during combat. 5★
At start of combat, if unit’s HP  = 100%, disables foe’s skills that guarantee foe’s follow-up attack and foe’s skills that prevent unit’s follow-up attack. 5★
At start of combat, if unit’s HP ≥ 50%, disables foe’s skills that guarantee foe’s follow-up attack and foe’s skills that prevent unit’s follow-up attack. 5★
Disables foe’s skills that guarantee foe’s follow-up attack and foe’s skills that prevent unit’s follow-up attack. 5★

Nyx as a Source Hero

Nyx Avatar

Value of Skills ★★★★☆

Inherit Spd/Res Solo 4 and Null Follow-Up 3

Nyx can be used to inherit Spd/Res Solo 4 and Null Follow-Up 3. From these options, Spd/Res Solo 4 is the rarest, as Nyx is the only hero with this skill (As of July 2021). There are a handful of other heroes with Null Follow-Up 3 available for inheritance, so think carefully when choosing to use Nyx as a source hero.

How to Get Nyx / Illustrations / Voice Actor / Quotes

How to Get Nyx

Obtain Through Regular Summon

Nyx 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)
Amber Hood
Illustrator Kousei Horiguchi
Appears In

Illustration

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