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.

Legendary Heroes - Fae: Childlike Dragon Featured Heroes
Legendary Roy [9.0/10]	Mirabilis [9.0/10]	Nyx [8.5/10]	Nifl [9.0/10]
Ullr [9.0/10]	Legendary Fae [9.0/10]	Hel [9.0/10]	Triandra [9.0/10]
Charlotte [9.0/10]	Duma [8.5/10]	Legendary Alm [9.0/10]	Mila [9.0/10]

Nyx Rating and Basic Information

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	Red / Red Tome / Infantry
Rarity	5 Star
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★

Ginnungagap 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.

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

Spd/Res Solo 4 If unit is not adjacent to an ally, grants Spd/Res+7 during combat.

Null Follow-Up 3 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)		★★★☆☆
Atk (12)		★★★★★
Spd (10)		★★★★★
Def (4)		★★☆☆☆
Res (6)		★★★★☆

◯ = 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

： Ginnungagap ： Draw Back ： Miracle ： -

： Life and Death 4 ： Null Follow-Up 3 ： Time's Pulse 3 ： Life and Death 3 ： -

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
： Ginnungagap ： Draw Back ： Glimmer ： -	： Atk/Spd Solo 4 ： Null Follow-Up 3 ： Joint Drive Atk ： Atk/Spd Solo 3 ： -

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	36	Rank: 1053/1184
Atk	42	Rank: 279/1184
Spd	40	Rank: 309/1184
Def	19	Rank: 989/1184
Res	28	Rank: 479/1184

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

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
Young Robin (M)	40	46	45	36	16	183
Nabata Tormod	40	43	45	25	30	183
Hayato	39	43	45	24	31	182
Sage Nino	38	41	46	20	32	177
Rearmed Ophelia	39	44	36	25	32	176
Salem	41	38	36	18	38	171
Hugh	40	38	42	27	24	171
Pelleas	43	40	36	21	31	171
Ewan	38	37	33	23	35	166
Miranda	38	36	35	21	36	166
Azelle	41	37	39	26	23	166
Erk	45	35	39	19	27	165
Nyx	36	42	40	19	28	165
Brave Lysithea	40	40	39	21	25	165
Gharnef	38	30	34	27	23	152
Bridal Tharja	39	35	35	21	21	151
Morgan (M)	37	33	34	20	26	150
Arvis	33	34	31	17	33	148
Tharja	39	32	34	23	20	148
Katarina	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	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

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'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
Flux	4	2	No Effect	5★
Ruin	6	2	No Effect	5★
Fenrir	9	2	No Effect	5★
Ginnungagap	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
New Moon	(Cooldown Count = 3) Resolve combat as if foe suffered Def/Res -30%.	5★
Luna	(Cooldown Count = 3) Treats foe's Def/Res as if reduced by 50% during combat.	5★

Passives

Skill Name	Effect	Learned At
Spd/Res Solo 1	If unit is not adjacent to an ally, grants Spd/Res+2 during combat.	5★
Spd/Res Solo 2	If unit is not adjacent to an ally, grants Spd/Res+4 during combat.	5★
Spd/Res Solo 3	If unit is not adjacent to an ally, grants Spd/Res+6 during combat.	5★
Spd/Res Solo 4	If unit is not adjacent to an ally, grants Spd/Res+7 during combat.	5★
Null Follow-Up 1	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★
Null Follow-Up 2	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★
Null Follow-Up 3	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

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.

• List of Source Heroes
• The Best Fodder Units

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	Fire Emblem Fates: Conquest and Fire Emblem Fates: Birthright

Illustration

FEH: Related Guides

Legendary Heroes - Fae: Childlike Dragon

Heroes from Legendary Heroes - Fae: Childlike Dragon
Legendary Roy [9.0/10]	Mirabilis [9.0/10]	Nyx [8.5/10]	Nifl [9.0/10]
Ullr [9.0/10]	Legendary Fae [9.0/10]	Hel [9.0/10]	Triandra [9.0/10]
Charlotte [9.0/10]	Duma [8.5/10]	Legendary Alm [9.0/10]	Mila [9.0/10]

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