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Analysis by lordhelpme
Eir - Merciful Death

5

Obtainable as a 5 only

Related Heroes

Hero Stats

Max Avg Total Stats at Lvl 40
149
HP 35
ATK 32
SPD 37
DEF 14
RES 31

Stat Variations

Level 1 Stat Variation
5★
HP ATK SPD DEF RES
Low 15 7 8 3 6
Middle 16 8 9 4 7
High 17 9 10 5 8

Level 40 Stat Variations
5★
HP ATK SPD DEF RES
Low 32 29 34 11 28
Middle 35 32 37 14 31
High 39 35 40 18 34

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.
HPATKSPDDEFRES

While she may certainly benefit from receiving IVs for further stat specialization, Eir can work perfectly fine with a Neutral IV set. This is worth taking into consideration as the free copy obtained through story progression will always be neutral.

Skill Sets

God is a Woman (Aether Raids Offense / Dedicated Support)

Build by lordhelpme
Recommended
Temari+ (+Res) A Fort. Def/Res 3
Alternate: Fury (3 or 4)
Smite B Sabotage Def 3
Alternate: Disarm Trap 3
Moonbow
Alternate: Iceberg
C Sparkling Boost+
IVs

+RES / -HP or -DEF

SPhantom Res 3

Show Explanation/Analysis

Preferred IV: +RES / -HP or -DEF

Weapon: Temari (+RES)

Assist: Smite / Flexible

Special: Moonbow / Iceberg / Luna

Passive A: Fort. Def/Res / Fury / Fortress Res

Passive B: Sabotage Skills / Disarm Trap / Link Skills / Chill Skills 

Passive C: Sparkling Boost+ / Flexible

Sacred Seal: Ground Orders / Phantom Res / Guidance / Aerobatics / Chill Skills / Drive Skills / Tactic Skills

  • Eir was tailor-made for defensive strategies within Aether Raids Offense: by merit of merely existing on a given team during Light Season, she immediately grants an effective +10 Resistance to all allies and the most wounded teammate is automatically healed for a whopping 20 HP each turn. This build aims to just build on this innate supportive utility, firstly by replacing Lyfjaberg with Temari to add another layer to her support via debuffs. 
    • Although she can work perfectly fine with a neutral IV set, Eir benefits quite a bit from receiving +RES if available to improve the consistency of the mass debuffs she can apply via Temari and potentially Sabotage skills. 
  • Fort. Def/Res is Eir’s ideal choice of A slot if aiming to invest fully into stacking her Resistance to further augment her ability to land her debuffs, with the decrease to her Attack being entirely negligible since she likely won’t be engaging with opponents to begin with. If unavailable, Fortress Res is an excellent alternative or if wanting to preserve her combat ability while still boosting Eir’s visible Resistance (though to a lesser degree), Fury can be considered as well. 
  • For her B slot, Eir has several readily available options depending on player preference:
    • Since Temari already applies a notable debuff to her foes’ Attack and Speed stats, one invest further into Eir’s debuffing capabilities either with a Sabotage skill (which shares a similar activation requirement to Temari) or a Chill; the choice between taking a Defense debuff or Resistance debuff, though, will depend on what type of damage the main carries specialize in.
    • Disarm Trap is a highly specialized, but interesting choice to safely test out enemy traps in Aether Raids and improve her allies positioning flexibility upon disabling them. However, since most traps are within close proximity of the actual opponents, using this skill does require a bit of finesse to fully utilize and will usually mean the assistance of a refresher or an outside ally.
    • Link skills are useful to apply strong bonuses to various stats at once, allowing her to wield buffing and debuffing utility simultaneously; these skills also pair well with Smite to strengthen her intended ally while also allowing them to easily close in on the enemies. The preferred choice will once again depend on player preference, but having it provide at least a Resistance buff may be ideal given the context of AR Offense where magical damage is highly prominent. 
  • Her exclusive Sparkling Boost+ should very rarely be replaced, as it can contribute majorly to her allies’ overall survivability; a passive 20 HP heal and +5 Resistance boost that can be applied regardless of where Eir is on the map is very hard to pass up on for tanking purposes. Still, for those deadset on replacing it, some alternatives include movement-based support C slots like Guidance or simply any available selection of Tactic or Drive.
  • The Phantom Res Sacred Seal fits excellently with this build’s intended purpose, assisting Eir in landing Temari’s debuff and potentially that of Sabotage skills if equipped; this may be of especially high value if using a neutral Eir, since she’ll need all the help she can get in boosting her base Resistance of 31. Any choice of Drive, Chill, or Tactic skill or Ground Orders/Guidance for movement support may also be considered.

no more tears left to cry (Aether Raids Offense / Wings of Mercy Enabler)

Build by lordhelpme
Pumpkin-a-Box+ (+Atk)
Alternate: Lyfjaberg
A Fury 4
Alternate: Fury 3
Positional Assist B Disarm Trap 3
Moonbow
Alternate: Glimmer
C Savage Blow 3
Alternate: Atk Smoke 3
IVs

+ATK or +SPD / -HP

SFury 3

Show Explanation/Analysis

Weapon: Pumpkin-a-Box+ (+ATK/SPD) / Lyfjaberg

Assist: Reposition / Flexible

Special: Moonbow / Glimmer /Ruptured Sky

Passive A: Fury (3 or 4)

Passive B: Disarm Trap / Desperation / Escape Route

Passive C: Savage Blow / Spd Smoke / Atk Smoke

Sacred Seal: Fury

  • Although this build once again assumes the context of Aether Raids Offense, it’s instead centered around Eir’s place in Galeforce-centric teams by becoming a beacon for other allies equipped with Wings of Mercy, with this strategy being more commonly known as “Eirforce.” The relevance of this strategy has admittedly faded quite a bit since the introduction of Ninja Lyn and Save skills, but it’s an option nonetheless that works decently enough with caution. A neutral IV set will once again work fine, though a boost to either one of her offensive stats is more than welcome. 
  • The main gameplan here is relatively straightforward and centers around lowering Eir’s HP below 50% with as minimal engagements as possible (maximum of two) for her allies to use her as a beacon for quick access to the enemy team, and there’s a few ways this can be achieved. 
    • Replacing Lyfjaberg with Pumpkin-a-Box and equipping Fury 4 in her A skill and the Fury Sacred Seal offers the greatest amount of safety as this automatically inflicts an entire 20 chip damage — enough for the princess to immediately drop down below 50% HP in one round of combat. This minimizes the risk of having Eir potentially falter due to subsequent rounds of combat and frees up refresher actions to actually assist those engaging in the Galeforce chain. 
    • This combination works up until she reaches 41+ HP, which should cover most players even during her bonus weeks unless she’s slightly merged at which point she’ll need refresher support to drop into Wings of Mercy range — there’s just no other way around it. 
    • At this point, though, it does ease her inheritance requirements since she can actually keep her base Lyfjaberg (note: not refined) and equip the widely available Fury 3 with the Fury Sacred Seal; this inflicts 16 chip damage and ensures Eir can act as a beacon within two engagements up to an HP cap of 64. This strategy also works decently for those aiming to invest minimally and who don’t mind using a refresher action for Eir to achieve her goal.  
  • Beyond the self-inflicted damage component of this set, there are other considerations to make. In particular, Disarm Trap is highly recommended to allow Eir to safely carry out her setup without worrying about trap placement disrupting this strategy — while it is possible to use her without Disarm Trap, doing so involves much higher risk. If unavailable, B slot skills that operate at low HP (e.g. Desperation, Escape Route, etc.) are possible alternatives. 
  • Using Savage Blow as her designated C slot is effective for allies to more easily sweep through the enemy forces, allowing them to potentially KO foes in a single hit. Alternatively, Spd Smoke or Atk Smoke can be equipped if her paired teammates are dependent on skills like Flashing Blade or Heavy Blade to accelerate their Special charge.

one last time (Magic Counter)

Build by lordhelpme
Lyfjaberg (+Eff) A Atk/Res Unity
Positional Assist B Mystic Boost 3
Iceberg
Alternate: Moonbow
C Sparkling Boost+
Alternate: Atk/Spd Rein 3
IVs

+ATK or +RES or +SPD / -DEF

SKestrel Stance 2

Show Explanation/Analysis

Weapon: Lyfjaberg (+EFF)

Assist: Reposition / Flexible

Special: Iceberg / Moonbow / Sol

Passive A: Atk/Res Unity / Close Ward

Passive B: Mystic Boost / Quick Riposte

Passive C: Sparkling Boost+ / Rein Skills / Smoke Skills / Joint Drive Skills / Flexible

Sacred Seal: Kestrel Stance / Atk/Res Solo / Quick Riposte / Atk/Spd Solo 

  • Eir’s refined Lyfjaberg offers an abundance of effects — massive in-combat stat enhancements, Guard, enemy follow-up denial, and further healing for herself and nearby allies — that altogether renders the princess pretty effective at defensive play, most notably against magic threats given her Resistance lean. This build capitalizes on precisely that and can be used either for general gameplay, or potentially to alleviate some of the pressure on her team’s main carries (though her inability to be Blessed highly discourages using her as the sole ranged tank).
  • Her base Atk/Res Unity is simply phenomenal, removing any fear of having stat penalties or Panic interfering and instead allowing her to exploit them for potentially massive stat enhancements. The main reason to consider removing it would be to utilize Close Ward in conjunction with Mystic Boost to extend Eir’s anti-magic capabilities against dragons as well, though whether this is actually worth it depends on preference.
  • Ranged fliers are unfortunately still quite lacking when it comes to defensive B skills, though Eir thankfully comes equipped with her ideal choice by default: Mystic Boost. This skill excels at further supplementing her healing potential to the point that she can very easily just use a damage-dealing Special without sacrificing durability. Quick Riposte deserves a mention, however, as it allows Eir to break through Impact effects, but it can be equipped as a Sacred Seal as well.
  • Keeping Sparkling Boost+ is an option to maintain Eir’s supportive value amongst her teammates. That being said, given the combat-intensive nature of this build, it’s perfectly within your reach to replace it with a more selfish skill like your choice of Rein, Smoke, or Joint Drive.
  • Lastly, beyond Quick Riposte, any stat-enhancing Sacred Seal will work wonderfully. It’s important to remember that refined Lyfjaberg requires that Eir maintain higher Speed than her foe to maintain its Impact and Guard effect active during the Enemy Phase, so prioritizing Speed boosts alongside either Attack or Resistance is recommended.

Strengths

Colorless Dagger Benefits

By merit of being colorless, Eir has the benefit of possessing neutral match-ups across the board (with the rare exception of opponents with a Raven effect), which is useful for more aggressive approaches to her playstyle. Furthermore, as a dagger unit, Eir can also access a wide variety of weapons that help serve different purposes, thus granting her immense flexibility as her role in a given team can easily be altered to best suit one’s needs. 

Sparkling Boost+

Despite being the princess of death, Eir is fully committed to keeping her friends alive and this shows its colors through the unique capabilities of her Sparkling Boost+. In addition to improving on the base version’s healing effect to now restore a staggering 20 HP to the most wounded ally at each turn’s start, Eir now grants an additional +5 Resistance to any ally as long as they start combat with 50% HP or more; this synergizes wonderfully with the base +5 Resistance she already grants via Light Blessings. Considering that the effects are mapwide, affect allies regardless of proximity to Eir herself, and come at no cost to her own turn, Sparkling Boost+ distinguishes the princess as an excellent support to defensively-tuned allies.

Flying Benefits

Being a flier comes with key strengths, including flexible mobility to assist allies and initiate combat from more favorable positions than otherwise possible. This also lets Eir potentially further support her allies with helpful mobility-based skills such as Guidance and Ground Orders; however, this will typically be limited to her B and Sacred Seal slots unless using Sparkling Boost is not preferred. 

Flexible Statline

Eir’s offensive statline is actually pretty solid; with an Attack/Speed combination of 32/37, she can assert a reasonable frontline presence, especially when paired with the boosts she can obtain from Lyfjaberg. Furthermore, her solid base Resistance of 31 can be leveraged to utilize skills that scale off it (e.g. Temari, Sabotage skills, Ploys) for team support.

Mythical Hero

Eir’s status as a Mythical Hero inherently offers her immense value as a unit. 

  • Beyond granting substantial Lift gain boosts merely by being present in Aether Raids Offense (and thus making it much easier to accumulate higher scores and climb through tiers), the princess of death also grants special stat boosts to any Light-Blessed allies for every copy of her present. 
  • While this is typical of Mythical Heroes, the significance of this in Eir’s case is that she specifically boosts Resistance — an extremely important stat for defensive strategies given the ubiquitous and deadly nature of magical damage on opposing teams. Accordingly, Eir’s ability to supplement this stat alongside Sparkling Boost’s passive healing makes her presence a great boon to tanking-oriented strategies during Light season; however, her impressive build variety and other strengths still impart a good deal of utility.

Lyfjaberg

Her refined Lyfjaberg received a pretty considerable boost in firepower through its unique refinement option, even in terms of pure stat advantages: assuming she enters combat at full HP, Eir’s weapon grants an exceptional +15/+8/+8/+18 enhancement upfront with no extra frills. This is before accounting for the conditional Guard, Impact, and Breath of Life effects it can also grant — and in both phases via minimal effort at that — all of which grant the death princess shocking combat prowess.

Weaknesses

Horrible Physical Bulk

Eir’s low physical bulk of 49 renders her incapable of dealing with most, if not all, forms of physical damage. Although her exclusive Lyfjaberg can be used to potentially mitigate this weakness at base through its negation of her opponent’s follow-up, it still means nothing if Eir dies in a single hit. As a result, she will usually prefer to stay away from sources of physical damage altogether. 

Effective Damage

Her flying status already makes her extremely susceptible to any stray archer’s onslaught, and this is only further compounded by her poor physical bulk to the point that she is all but guaranteed to die from a single strike from an archer even if equipped with Iote’s Shield. Staying away from them will be crucial to safeguarding her longevity. 

Somewhat Wasted PRF

For as much as it brings to the table, it’s a bit of a shame that refined Lyfjaberg admittedly doesn’t actually do much for Eir in bumping up her relevance as a Mythical Hero. It improves her own combat, certainly, but considering how infrequently she’ll actually see combat with it equipped — as most offensive Eir sets will use Pumpkin-a-Box instead for beaconing — it would have been nice for her weapon to bear actual supportive utility instead. Even building off the base version’s self-inflicted chip damage would have been neat to differentiate her as the primary rationale for using her offensively is Galeforce strategies, and refined Lyfjaberg actually dissuades from that because it heals instead. 

It’s not a horrible weapon by any means and can be used within Aether Raids Offense, but it just doesn’t really do much for Eir in her specific role other than opening up some room for her to operate as an off-tank.

Weapon Skills

Weapons SP Rng. Mt.
Iron DaggerAfter combat, inflicts Def/Res-3 on foe through its next action.
Dagger users only.
50 2 3
Steel DaggerAfter combat, inflicts Def/Res-3 on foe through its next action.
Dagger users only.
100 2 5
Silver DaggerAfter battle, inflicts Def/Res-5 on foe through its next action.
Dagger users only.
200 2 7
LyfjabergGrants Res+3. At start of combat, if unit's HP is greater than or equal to 50%, grants Atk/Spd+4 during combat, and if unit initiates combat, foe cannot make a follow-up attack. After combat, if unit attacked, inflict Def/Res-7 on target and foes within 2 spaces of target through their next actions, and if bonus was granted to unit, deals 4 damage to unit.
Learns by default at 5 ★
Non-Inheritable skill.
400 2 14
Weapon Evolution
Weapon Upgrades
Weapon Upgrades

Special Skills

Special Skills SP Turns
Chilling WindBoosts damage dealt by 50% of unit's Res.
Learns by default at 5 ★
Non-inheritable by Staff-wielding units.
100 4
IcebergBoosts damage dealt by 50% of unit's Res.
Unlocks at 5 ★
Non-inheritable by Staff-wielding units.
200 3

Passive Skills

Passive Skills SP Slot
Darting Blow 1Grants Spd+2 during combat if unit initiates the attack.
Non-inheritable by Staff-wielding units.
50
A
Swift Sparrow 1If unit initiates combat, unit granted Atk/Spd+2 during battle.
Non-inheritable by Staff-wielding units.
120
A
Swift Sparrow 2If unit initiates combat, unit granted Atk/Spd+4 during battle.
Non-inheritable by Staff-wielding units.
Unlocks at 5 ★
240
A
Mystic Boost 1Disables foe's skills that "calculate damage using the lower of foe's Def or Res" and "calculate damage from staff like other weapons." Restores 2 HP after combat.
Inheritable by all units.
60
B
Mystic Boost 2Disables foe's skills that "calculate damage using the lower of foe's Def or Res" and "calculate damage from staff like other weapons." Restores 4 HP after combat.
Inheritable by all units.
120
B
Mystic Boost 3Disables foe's skills that "calculate damage using the lower of foe's Def or Res" and "calculate damage from staff like other weapons." Restores 6 HP after combat.
Inheritable by all units.
Unlocks at 5 ★
240
B
Sparkling BoostAt start of turn, restores 10 HP to ally that has been dealt the most damage. (Excludes unit.)
Non-Inheritable skill.
Unlocks at 5 ★
300
C
Sparkling Boost+At start of turn, restores 20 HP to ally that has been dealt the most damage. (Excludes unit.) At start of any ally's combat, if ally's HP ≥ 50%, grants Res+5 to ally during combat. (Excludes unit.)
Non-Inheritable skill.
Unlocks at 5 ★
300
C

Other Info

Origin
Fire Emblem Heroes

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