Table of Contents

Tier Rating

Analysis by Adonyx
Tailtiu - Thunder Noble


Obtainable as a 4 - 5 only

Hero Stats

Max Avg Total Stats at Lvl 40
HP 39
ATK 32
SPD 35
DEF 17
RES 25

Stat Variations

Level 1 Stat Variation
Low 16 7 8 3 5
Middle 17 8 9 4 6
High 18 9 10 5 7

Level 40 Stat Variations
Low 35 29 32 13 22
Middle 39 32 35 17 25
High 42 35 38 20 29

IV Sets

Key stats worth increasing through nature if possible.
Complementary stats that matter, but not to the point of picking them over key stats for nature increase.
Relatively worthless stat that can safely be decreased through nature.


  • +SPD: As with most Blade tome mages, Speed is easily Tailtiu’s most important stat. It allows her to secure as many doubles as possible to maximize her offensive potential.

  • +ATK: This is an acceptable boon if +SPD is otherwise unavailable, as it still increases Tailtiu’s offensive potential.


  • HP: Lowering both physical and magical bulk is not ideal for a squishy mage like Tailtiu, especially considering that -HP is a superbane (-4 to the stat).

  • DEF: While Defense is Tailtiu’s lowest stat, a bane would be detrimental because it would remove her ability to survive a single hit from most blue physical damage threats. It is also a superbane (-4 to the stat).


  • -RES: Tailtiu’s magical bulk is easily capable of letting her survive a single hit from non-green magical damage, and a -RES bane won’t change that. Her Resistance is also not a particularly useful stat, as she can’t make good use of Ploys, and will still be taken out by powerhouse mages like Reinhardt.

Skill Sets

Friege Bladestorm (Offensive Nuke)

Blárblade+ A Fury 3
Reposition B Desperation 3
Glimmer C Drive Spd 2
SP1,365SSpeed +3

Show Explanation/Analysis
  • Preferred IVs: +SPD / -RES
  • Weapon: Blárblade+
  • Assist: Reposition / Ardent Sacrifice
  • Special: Glimmer / Draconic Aura
  • Passive A: Fury / Swift Sparrow / Life and Death / Brazen Atk/Spd
  • Passive B: Desperation
  • Passive C: Drive Spd / Varies with Team
  • Sacred Seal: Speed +3 / Heavy Blade

This is a standard Blade tome offensive set. Tailtiu comes with the proper tome in her base kit, making this a rather cheap build to create. As with all Blade tome setups, Tailtiu will require support from her team in the form of buffs in order to maximize her damage output with her tome.

Glimmer and Draconic Aura are both great Specials to pair with a Blade tome, as they both gain additional scaling from the bonus damage of the Blade tome’s effect. Draconic Aura does more consistent damage, but its higher cooldown can make it difficult to utilize without the Heavy Blade seal. Otherwise, run Glimmer with a Speed +3 seal.

Fury, Swift Sparrow, Life and Death, and Brazen Atk/Spd are all options for Tailtiu’s A skill, as they all provide a strong boost to her offensive stats. Fury is recommended as the optimal choice, as it minimizes the chance of Tailtiu getting KO’d in one hit while also granting a good boost to her stats. The post-combat recoil damage can also help land Tailtiu safely into Desperation range. Swift Sparrow offers slightly more offensive stats, but has a significant trade-off of not granting stats on Enemy Phase, as well as no additional defensive stats.

Brazen Atk/Spd is by far the most expensive option, as well as requiring significant setup. Because it has no effect when Tailtiu is above the HP threshold, Brazen Atk/Spd necessitates the use of Ardent Sacrifice to drop Tailtiu’s HP to the required level; however, this is rewarded with the largest possible boost to her offenses, as well as simultaneously pushing her into Desperation range. Life and Death will work at all HP levels, but will have a significant impact on Tailtiu’s bulk; it’s a good idea to run Ardent Sacrifice with Life and Death to prevent Tailtiu from getting KO’d in one hit (this can be mitigated to a certain extent with full buffs - including Defense and Resistance).

When In Rome… (Triangle Adept Raven)

Blárraven+ A Triangle Adept 3
Reposition B Bowbreaker 3
Moonbow C Drive Spd 2
SP1,860SDistant Def 3

Show Explanation/Analysis
  • Preferred IV: +ATK or +SPD or +DEF / -RES or -HP
  • Weapon: Blárraven+
  • Assist: Reposition
  • Special: Moonbow
  • Passive A: Triangle Adept
  • Passive B: Bowbreaker / Quick Riposte / Swordbreaker
  • Passive C: Drive Spd / Varies with Team
  • Sacred Seal: Distant Def / Deflect Missile

Despite her poor defenses, Tailtiu is actually capable of running a Raven tome set, mostly thanks to the Distant Def seal. She is capable of tanking and taking out even the strongest archers and most red threats, but will need to be mindful of anyone running Cancel Affinity.

Bowbreaker is taken mainly to prevent Tailtiu from getting run over by archers like Brave Lyn and Halloween Jakob, as both are easily capable of potentially landing a quad strike on her. Quick Riposte provides better coverage, though she does run the risk of getting overpowered by stronger enemies. Swordbreaker can help break through the high Speed of many sword units, but keep in mind that attacking certain sword units like Ayra and Zelgius can result in an incredibly potent retaliation that Tailtiu cannot handle, even with Triangle Adept.

Distant Def is vitally important to increase Tailtiu’s defenses enough to allow her to feasibly survive the stronger ranged threats this build is designed to tackle. Deflect Missile is a bit more niche than Distant Def, but can work great if not running Bowbreaker as it goes a long way to protect Tailtiu from quad strikes.


Unfortunately for Tailtiu, she was outclassed from the very moment of her introduction into Fire Emblem Heroes (by Linde). There really isn’t anything Tailtiu can do that another unit doesn’t already do better.

However, despite being outclassed, Tailtiu is a perfectly serviceable mage that even has the great benefit of coming with a strong base kit - she only needs minimal Skill Inheritance to have a complete build. Tailtiu also has the benefit of being available in the summoning pool at 4* rarity, meaning she is significantly easier to pull, merge, and find optimal IVs for than the likes of Linde.

Thanks to the power of Blárblade, Tailtiu is perfectly capable of being a powerhouse attacker that can take out entire teams, given the proper support.


Decent Offenses

32/35 Attack and Speed allow Tailtiu to function as an offensive nuker unit, particularly when given the proper support needed to utilize her base Blárblade tome.

Just Enough Bulk

Though Tailtiu has poor Defense and Resistance, she has enough combined bulk thanks to her decent HP that she’s unlikely to get KO’d in a single hit by non-green threats; this is perfect for a nuker setup like her Blade tome build.

Great Base Kit

Tailtiu is considerate enough to have Blárblade+ as part of her base kit, meaning that fully building her is actually quite cheap with  low investment. She doesn’t actually need to replace any of the skills in her kit to be fully functional, though she is significantly improved with skills like Fury, Desperation, and Glimmer.

Good Availability

One important consideration for Tailtiu is her addition to the 4* summoning pool; while she is outclassed offensively by Linde, Tailtiu is significantly easier to summon, meaning that she is much easier to obtain optimal IVs for as well as merge.



Tailtiu’s decent offenses pale in comparison to Linde’s 35/36 offensive spread; Linde even has access to Aura/Dark Aura, offering her vastly superior utility. There simply is no specific niche that Tailtiu can fill that no other blue mage does better.


One of the biggest “problems” with infantry Blade mages is that they cannot benefit from the incredibly potent buffs like Hone Cavalry. They can benefit from Tactics skills, but those require heavy investment due to being much harder to obtain (not to mention the team composition requirements being a bit difficult to manage at times).

Team Options

  • Buffers: As primarily a Blade tome mage, Tailtiu needs buff support from her team in order to power her tome. Eirika, Ephraim, and Performing Azura all provide the field buffs needed thanks to their weapons, while other buffers like Marth and Sanaki can provide a strong boost in stats (that doesn’t directly contribute to the Blade tome’s effect).
  • Debuffers: While debuffs don’t provide a direct boost to Tailtiu’s damage output via her Blade tome, they do provide a significant boost in her combat ability, much like Spur/Drive buffs. Some good allies are Arvis, Spring Sharena, and Gunnthrá.
  • Refreshers: As an offensive unit, Tailtiu receives massive benefit from Refreshers’ ability to allow her to attack multiple enemies as well as the added versatility that an additional turn will provide. Performing Azura and New Year Azura are the best options, due to the former’s ability to buff while Singing and the latter’s ability to provide Guidance support for extra mobility.
  • Strong Reds: Regardless of build, Tailtiu will often struggle against strong green threats. Units like Legendary Ike, Ayra, and Tiki (Adult) can easily keep Tailtiu safe from greens.


  • Strong Greens: Tailtiu will always struggle against greens, but will get outright obliterated by them if running a Triangle Adept build. Examples include Fae, Sheena, Soren, and Fallen Robin (M).

  • Debuffers: Tailtiu’s low defenses leave her vulnerable to all types of debuffs; units like Gunnthrá, Spring Sharena, Spring Catria, Arvis, and Lute can heavily debilitate Tailtiu’s ability to output damage.

  • Negating Buffs: A huge portion of Tailtiu’s power comes from her allies’ buffs powering her Blade tome; units that can negate those buffs like Brave Lyn and Deirdre remove Tailtiu’s advantage and can wipe her out.

    • Panic Ploy: In a similar vein, units with Panic Ploy can not only negate Tailtiu’s buffs, but also turn them into debuffs. Some common users include Zelgius, Effie, and Nowi.

  • Offense: Due to the nature of her Blade tome setup being a glass cannon-type build, Tailtiu is very frail and cannot withstand sustained offensive pressure. Units with overpowering offenses (such as with Brave weapons or Bold Fighter) like Cherche, Hector (LA), Raven, Ephraim, and Reinhardt can easily take out Tailtiu if allowed to engage properly.

Weapon Skills

Weapons SP Rng. Mt.
Blue Tome Users Only
50 2 4
Blue Tome Users Only
100 2 6
BlárbladeSlows Special trigger (cooldown count+1). Adds total bonuses on unit to damage dealt.
Learns by default at 4 ★
Blue Tome Users Only
200 2 9
Blárblade+Slows Special trigger (cooldown count+1). Adds total bonuses on unit to damage dealt.
Learns by default at 5 ★
Unlocks at 5 ★
Blue Tome Users Only
300 2 13
Tome of ThoronAt start of turn, if unit's HP ≤ 75% and unit's attack triggers Special, grants Special cooldown count-1, and deals +10 damage when Special triggers
Unlocks at 5 ★
Non-Inheritable skill.
400 2 14
Weapon Evolution
Weapon Upgrades
Weapon Upgrades

Support Skills

Support Skills Rng. SP
Rally ResistanceGrants Res+4 to an adjacent ally until the end of the turn.
Learns by default at 4 ★
1 150
Rally Spd/ResGrants Spd/Res+3 to an adjacent ally until the end of the turn.
Unlocks at 4 ★
1 300

Passive Skills

Passive Skills SP Slot
Attack +1Grants Atk+1.
Inheritable by all units.
Attack/Res 1Grants Atk/Res+1.
Unlocks at 4 ★
Inheritable by all units.
Attack/Res 2Grants Atk/Res +2.
Unlocks at 5 ★
Inheritable by all units.
Spur Spd 1Grants adjacent allies Spd+2 during combat.
Inheritable by all units.
Drive Spd 1Grants allies within 2 spaces Spd+2 during combat.
Inheritable by all units.
Drive Spd 2Grants allies within 2 spaces Spd+3 during combat
Unlocks at 4 ★
Inheritable by all units.

Other Info

Fire Emblem: Genealogy of the Holy War

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