Thrasir Builds and Best IVs

This is a ranking page for the hero Thrasir - Omnicidal Witch 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 Thrasir.

Legendary Heroes - Nanna: Beloved Princess Featured Heroes
Legendary Lilina [9.0/10]	Legendary Sigurd [9.0/10]	Legendary Nanna [9.0/10]	Legendary Chrom [9.5/10]
Seiros [9.0/10]	Ullr [9.0/10]	Thrasir [9.0/10]	Legendary Celica [9.0/10]
Rennac [9.0/10]	Mila [9.0/10]	Wolf [9.0/10]	Ash [9.0/10]

Thrasir 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)

Thrasir - Omnicidal Witch: Basic Information

Color / Weapon Type / Move Type	Green / Green Tome / Infantry
Rarity	5 Star
What Kind of Character Are They?	・An Anima-type Mythic hero ・Nullifies enemy guaranteed follow-up attacks ・Can gain an additional attack immediately after her first

Thrasir Skills at 5★

Ífingr Might: 14　 Range: 2 Effective against dragon foes. If unit is within 3 spaces of an ally, grants Atk/Spd/Def/Res+4 during combat and prevents a foe’s follow-up attack. If unit attacked, inflicts Atk/Spd/Def/Res-4 on nearest ally through its next action after combat

Moonbow Cooldown Count = 2 Treats foe's Def/Res as if reduced by 30% during combat.

Atk/Spd Ideal 4 At start of combat, if unit's HP = 100% or if 【Bonus】 is active on unit, grants Atk/Spd+7 to unit during combat. At start of combat, if unit's HP = 100% and 【Bonus】 is active on unit, grants an additional Atk/Spd+2 to unit during combat.

Killing Intent+ At start of turn, inflicts 【Exposure】 on nearest foes within 5 spaces of unit and foes within 2 spaces of those foes through their next actions. At start of combat, if foe's HP ≤ 99% or if 【Penalty】 is active on foe, inflicts Spd/Res-5 on foe during combat, and also, if unit initiates combat, unit can make a follow-up attack before for can counterattack.

Panic Smoke 3 Inflicts【Panic】on target and foes within 2 spaces of target after combat. 【Panic】 Converts bonuses on target into penalties through its next action.

Thrasir Best IVs

Recommended IVs

Stat	Superboon/Superbane	IV Recommendation
HP (18)		★★☆☆☆
Atk (23)		★★★★☆
Spd (9)		★★★★★
Def (6)		★★★☆☆
Res (5)		★★★☆☆

◯ = 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.

+Spd and -HP

Thrasir's best IVs are +Spd and -HP. Her B skill has a similar effect to that of Desperation built into it, so the easier it is for her to trigger follow-up attacks, the better. This stat is also a superboon for her, so an asset will allow her to get Spd+4.

Thrasir Best Builds

Budget Thrasir

： Ífingr ： Reposition ： Moonbow ： -

： Atk/Spd Ideal 4 ： Killing Intent+ ： Panic Smoke 3 ： Swift Sparrow 2 ： -

How to Use, Explanation

This budget build uses most of Thrasir's base kit to function as a speedy mage attacker.

Invested Offensive Attacker Thrasir

： Ífingr ： Reposition ： Moonbow ： -

： Atk/Spd Ideal 4 ： Killing Intent+ ： Atk/Spd Menace ： Blade Session 3 ： -

How to Use, Explanation

This build uses Atk/Spd Menace to increase Thrasir's offenses and activate Atk/Spd Ideal 4.

Source Heroes for All Skills

Thrasir Best Weapon Refine

Effect of Thrasir's Refined Weapon

Exclusive Weapon Effect from Refining (Special Effect Type)
Ífingr	SP: 400
Might: 14　Range: 2　HP: Effective against dragon foes. If unit is within 3 spaces of an ally, grants Atk/Spd/Def/Res+6 to unit and neutralizes effects that guarantee foe's follow-up attacks and effects that prevent unit's follow-up attacks during combat, but after combat, if unit attacked, inflicts Atk/Spd/Def/Res-4 on nearest ally through its next action. Accelerates Special trigger (cooldown count-1). At start of combat, if unit's HP ≥ 25%, grants Atk/Spd/Def/Res+4 to unit and neutralizes foe's bonuses to Spd/Res (from skills like Fortify, Rally, etc.) during combat. ：500　：200

We recommend the Special Effect Refine for Ífingr

Refined Ífingr grants a Null Follow-Up effect, bonus stats and a Lull Spd/Res effect.

The best effect from refining Thrasir's weapon is the Null Follow-Up effect, as this allows her to create follow-up attacks and deal significantly more damage than before.

Thrasir Stats

Stat Rankings

Neutral Stats at Lv. 40 (5★)
162
HP	40	Rank: 489/1171
Atk	33	Rank: 898/1171
Spd	39	Rank: 368/1171
Def	23	Rank: 826/1171
Res	27	Rank: 539/1171

Stat Values

Lv 40+10 Stats (5★)

	HP	Atk	Spd	Def	Res	Total
+10 Merges W/ Skill Bonuses	45	52	44	27	31	199
Lv.40 +10	45	38	44	27	31	185

Stats at Lv 40

	HP	Atk	Spd	Def	Res	Total
5★- Adjusted for Skills	40	47	39	23	27	176
5★ Lv.40	40	33	39	23	27	162

Initial Stats (with Skills)

	HP	Atk	Spd	Def	Res	Total
5★ Lv.1	18	23	9	6	5	61

Stat Comparison of Similar Heroes

Hero	HP	Atk	Spd	Def	Res	Total
Rearmed Lilina	40	48	35	17	48	188
Fallen Nergal	40	45	16	39	43	183
New Year Kvasir	40	45	47	21	30	183
Rearmed Sonya	38	47	32	20	45	182
Ascended Ced	43	45	46	22	26	182
Brave Soren	40	45	34	16	47	182
Tea Tailtiu	39	42	44	21	31	177
Citrinne	38	46	27	22	44	177
Heiðr	38	45	45	29	20	177
Legendary Robin (M)	40	45	30	31	31	177
Bastian	40	44	28	20	45	177
Céline	37	41	44	17	38	177
Arthur	40	42	41	30	18	171
Limstella	41	39	23	32	36	171
Young Ilyana	40	41	30	18	42	171
Gatekeeper	41	37	17	40	36	171
Legendary Byleth (M)	40	39	41	25	21	166
Pent	40	38	39	19	30	166
Luthier	43	37	36	20	30	166
Orochi	40	40	24	24	37	165
Asbel	40	36	42	21	26	165
Young Merric	41	34	41	21	25	162
Legendary Celica	40	38	38	18	28	162
Thrasir	40	33	39	23	27	162
Ced	37	35	39	19	31	161
Lugh	37	35	36	17	31	156
Lewyn	38	34	37	17	25	151

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

Thrasir Roles, Strengths, and Weaknesses

Thrasir Roles

Thrasir - Omnicidal Witch 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

Thrasir 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.

Mythic Hero Effect can boost allies' HP and Def

Eff.	Atk+3	Spd+4	Def+5	Res+5

Thrasir is a Mythic Hero, and when summoned, you will receive an Anima Blessing. During Anima Season, allies who have been given an Anima Blessing and appear together with Thrasir in batlle will receive a HP+5 and Def+5 bonus to their stats, increasing the party's overall power.

Thrasir Strengths

Exclusive weapon that is effective on dragons

Thrasir's exclusive weapon Ífingr is effective on dragongs, and will give her a +4 buff to all stats in combat if she is within 3 spaces of an ally. On top of this, it will negate that foe's guaranteed follow-up attack. While this is a very good weapon skill, it will also inflict a penalty on the nearest ally after combat, so you must keep an eye on where you are positioning your units.

Exclusive skill with built in Desperation

Thrasir's B skill Killing Intent will inflict Spd/Res-5 on a foe in combat and allow Thrasir to get a follow-up attack before the foe's counterattack, if that foe has taken damage or has an active penalty cast on them.

If an ally has a Seal skill, or an ally like Duma can cast damage on all foes on the first turn, this skill will be very easy to trigger, so edit your team with an ally who can help trigger it.

Flashing Blade makes special easy to trigger

Flashing Blade 4 will give Thrasir special cooldown charge +1 and +5 damage on her special when her Spd exceeds that of the foe. This has excellent synergy with Killing Intent, and effectively makes it so that Moonbow will be ready to trigger after the first attack, and on her follow-up attack, her special will deal additional damage, easily wiping out a large number of foes.

Thrasir Weaknesses

Inflicts a debuff on nearby allies after combat

Thrasir's exclusive weapon Ífingr gives her a powerful buff during combat with a nearby ally, but after this effect triggers, it will cast a significant penalty on that ally. This penalty can be eliminated through Harsh Command or Restore, so pairing her together with an ally that has one of these skills is a good move.

Thrasir Team and Counters

Teammates for Thrasir

Mirabilis	Plumeria	Brave Hector	Reinhardt
Peony	Reyson	Leanne	Flayn

Flayn or refresher-assists

Flayn provides great heals, damage reduction, and movement-assist to Thrasir. She is a very powerful support unit! If you do not have Flayn, any other healer can do. Refresher-assist supports are great partners for Thrasir too.

Reyson or Leanne

Reyson and Leanne provide both heals and refreshes to Thrasir so she can brawl it out in the frontlines for much longer.

Blue powerhouses, preferably those who are strong against red units

Thrasir needs a partner to cover her weakness against red units. It might be smart to include a blue magic unit as well to cover foes that are strong against physical hits. Some good example for this spot are Reinhardt, Brave Hector, or even an offensively built Peony.

Thrasir Counters

Líf	Sothis	Altina	Young Caeda
Fallen Julia	Summer Byleth (F)	Reginn	Winter Altina

High-powered red units.

Thrasir has great stats across the board. For defenses, she has decent Spd, and balanced Def and Res stats.

Altina, and Winter Altina can nail double strikes on her without the need for a Spd check so they are very deadly against Thrasir. Their access to Vantage effects also counter Killing Intent directly. Young Caeda also has native access to a Vantage effect.

Null Follow-Up

Type	Passive Skill B
Effect	Disables foe’s skills that guarantee foe’s follow-up attack and foe’s skills that prevent unit’s follow-up attack.
Required SP	240 (360 if inherited)
Sacred Seal	Null Follow-Up 1 Null Follow-Up 2 Null Follow-Up 3

Skill Family

Null Follow-Up 3	Null Follow-Up 2	Null Follow-Up 1
Phys. Null Follow	Mag. Null Follow

This skill counters Ífingr's effects and greatly reduces Thrasir's ability to sweep through foes.

Should you Unlock Potential?

Should You Unlock Potential for this Hero?	Cannot Unlock Potential

Thrasir - Omnicidal Witch Only Appears as a 5 Star Hero!

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

Unlock Potential Tier List

Thrasir - List of Skills

Weapons

Skill Name	Might	Range	Effect	Learned At
Wind	4	2	No Effect	5★
Elwind	6	2	No Effect	5★
Rexcalibur	9	2	No Effect	5★
Ífingr	14	2	Effective against dragon foes. If unit is within 3 spaces of an ally, grants Atk/Spd/Def/Res+4 during combat and prevents a foe’s follow-up attack. If unit attacked, inflicts Atk/Spd/Def/Res-4 on nearest ally through its next action after 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★
Moonbow	(Cooldown Count = 2) Treats foe's Def/Res as if reduced by 30% during combat.	5★

Passives

Skill Name	Effect	Learned At
Atk/Spd Ideal 1	At start of combat, if unit's HP = 100% or if 【Bonus】 is active on unit, grants Atk/Spd+3 to unit during combat. At start of combat, if unit's HP = 100% and 【Bonus】 is active on unit, grants an additional Atk/Spd+2 to unit during combat.	5★
Atk/Spd Ideal 2	At start of combat, if unit's HP = 100% or if 【Bonus】 is active on unit, grants Atk/Spd+4 to unit during combat. At start of combat, if unit's HP = 100% and 【Bonus】 is active on unit, grants an additional Atk/Spd+2 to unit during combat.	5★
Atk/Spd Ideal 3	At start of combat, if unit's HP = 100% or if 【Bonus】 is active on unit, grants Atk/Spd+5 to unit during combat. At start of combat, if unit's HP = 100% and 【Bonus】 is active on unit, grants an additional Atk/Spd+2 to unit during combat.	5★
Atk/Spd Ideal 4	At start of combat, if unit's HP = 100% or if 【Bonus】 is active on unit, grants Atk/Spd+7 to unit during combat. At start of combat, if unit's HP = 100% and 【Bonus】 is active on unit, grants an additional Atk/Spd+2 to unit during combat.	5★
Flashing Blade 1	If unit’s Spd ≥ foe’s Spd+5, grants Special cooldown charge +1 per unit’s attack. (Only highest value applied. Does not stack.)	5★
Flashing Blade 2	If unit’s Spd ≥ foe’s Spd+3, grants Special cooldown charge +1 per unit’s attack. (Only highest value applied. Does not stack.)	5★
Flashing Blade 3	If unit’s Spd ≥ foe’s Spd, grants Special cooldown charge +1 per unit’s attack. (Only highest value applied. Does not stack.)	5★
Flashing Blade 4	If unit’s Spd > foe’s Spd, grants Special cooldown charge +1 and deals +5 damage per unit’s attack. (Only highest value applied. Does not stack.)	5★
Killing Intent	At start of combat, if foe's HP < 100% or if【Penalty】is active on foe, inflicts Spd/Res-5 on foe, and if unit initiates combat, unit can make a follow-up attack before foe can counterattack. 【Penalty】 All effects that last "on foe through its next action." Includes penalties inflicted by a skill like Panic or Threaten and negative status effects (preventing counterattacks, restricting movement, or the effects of a skill like Triangle Adept or Guard).	5★
Killing Intent+	At start of turn, inflicts 【Exposure】 on nearest foes within 5 spaces of unit and foes within 2 spaces of those foes through their next actions. At start of combat, if foe's HP ≤ 99% or if 【Penalty】 is active on foe, inflicts Spd/Res-5 on foe during combat, and also, if unit initiates combat, unit can make a follow-up attack before for can counterattack.	5★
Panic Smoke 1	If unit initiates combat, inflicts【Panic】on target and foes within 1 space of target after combat. 【Panic】 Converts bonuses on target into penalties through its next action.	5★
Panic Smoke 2	If unit initiates combat, inflicts【Panic】on target and foes within 2 space of target after combat. 【Panic】 Converts bonuses on target into penalties through its next action.	5★
Panic Smoke 3	Inflicts【Panic】on target and foes within 2 spaces of target after combat. 【Panic】 Converts bonuses on target into penalties through its next action.	5★

Thrasir as a Source Hero

Value of Skills	★★★★★

Inheriting Flashing Blade 4 or Panic Smoke

Thrasir can be used to inherit the skills Flashing Blade 4 or Panic Smoke. However, as a rare and powerful Mythic Hero, we recommend building at least one Thrasir before foddering or merging any duplicates.

List of Source Heroes

The Best Fodder Units

How to Get Thrasir / Illustrations / Voice Actor / Quotes

How to Get Thrasir

Obtained through a Special Summoning Event!

Thrasir is a limited time Hero who can be pulled from a Mythic Hero Summoning event. They do not appear in regular summons.

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

Voice Actor and Illustrator Information

Voice Actor (English)
Illustrator	コザキユースケ
Appears In	Fire Emblem Heroes

Illustration

FEH: Related Guides

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Legendary Lilina [9.0/10]	Legendary Sigurd [9.0/10]	Legendary Nanna [9.0/10]	Legendary Chrom [9.5/10]
Seiros [9.0/10]	Ullr [9.0/10]	Thrasir [9.0/10]	Legendary Celica [9.0/10]
Rennac [9.0/10]	Mila [9.0/10]	Wolf [9.0/10]	Ash [9.0/10]

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Axe	Green Tome
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Green Beast	Green Bow