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MementoMori

Eureka Builds: Best Runes and Team Comps

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Eureka is an Azure Soul Sorcerer-type SR (Limited) Rarity Witch in MementoMori. Learn more about this Witch's basic info, skills, arcana, and which gacha you can find her in!

EurekaEureka Icon
Best Builds How to Beat
Story and Profile

List of Contents

Eureka Basic Info

Eureka Overview

Eureka
MementoMori - Eureka Icon
PvE Rank PvP Rank
MementoMori - B Icon MementoMori - A Icon
Base Rarity Soul Type Role
SR (Limited) MementoMori - Azure Icon Azure MementoMori - Sorcerer Icon Sorcerer Debuffer

Eureka Analysis

AoE Damage and Damage Cut Debuff

Memento Mori - Carrot Magic Icon
Carrot Magic 		Memento Mori - My Own Eureka Pace Icon
My Own Eureka Pace

Skill Skill Effect
Memento Mori - Carrot Magic Icon
Carrot Magic 		Level 1 (Unlocks by default)
Deals 1 magical attack equal to 120% of Eureka’s ATK to 2 random enemies, and has a 50% chance to inflict［X Mark］ on all targets for 2 turns. ［X Mark］ decreases the damage an afflicted target deals by 10%.
Level 2 (Unlocks by level 81)
The magical attack’s damage becomes equal to 180% of her ATK.
Level 3 (Unlocks by level 161)
The chance to inflict ［X Mark］ becomes 70%.
Skill Skill Effect
Memento Mori - My Own Eureka Pace Icon
My Own Eureka Pace 		Level 1 (Unlocks by level 11)
Deals 1 magical attack equal to 340% of Eureka’s ATK to 2 random enemies.
Level 2 (Unlocks by level 21)
The magical attack’s damage becomes equal to 440% of her ATK.
Level 3 (Unlocks by level 101)
Additionally, if a target is afflicted with ［X Mark］, the magical attack’s damage to that target becomes equal to 1760% of Eureka’s ATK.
Level 4 (Unlocks by level 181)
The targets of this skill become 3 random enemies.

Carrot Magic is suitable for weakening enemies and reducing the damage they deal. With this skill, Eureka can hit and weaken two random enemies, reducing their damage by 10%. At higher levels, it has an excellent chance to weaken enemies. The damage is relatively low compared to other skills, but its most crucial function is [X Mark].

My Own Eureka Pace is a skill that deals significant damage. If the target is afflicted with [X Mark], the damage skyrockets to 1760% of Eureka's ATK at level 3. At level 4, the kill targets three random enemies, increasing its impact. Its maximum potential is heavily reliant on the presence of the [X Mark] debuff.

Debuff Management

Memento Mori - On To New Frontiers Icon
On To New Frontiers

Skill Skill Effect
Memento Mori - On To New Frontiers Icon
On To New Frontiers 		Level 1 (Unlocks by level 41)
When Eureka is inflicted with a debuff from an active skill, this skill has a 70% chance of inflicting ［X Mark］ on 3 random enemies for 2 turns. ［X Mark］ decreases the damage an afflicted target deals by 10%.
Level 2 (Unlocks by level 121)
Additionally dispels 1 debuff each from Eureka and the 2 allies with the highest ATK.
Level 3 (Unlocks by level 201)
Additionally, if the debuff that is inflicted on Eureka is an action hindering debuff, the targets who are inflicted with ［X Mark］ become 5 random enemies.

On To New Frontiers helps manage debuffs and weaken enemies. When Eureka gets a debuff, there's a 70% chance that three random enemies will get [X Mark] for two turns. [X Mark] makes enemies deal 10% less damage.

This skill removes one debuff from Eureka and the two allies with the two allies with highest ATK at higher levels. If the debuff is action-hindering, [X Mark] will affect five random enemies instead of 3. Debuffers like Soltina or Lunalynn may endanger their allies using their debuff on Eureka.

Ally Shield for Azure Souls

Memento Mori - Dreamy Adventurer Icon
Dreamy Adventurer

Skill Skill Effect
Memento Mori - Dreamy Adventurer Icon
Dreamy Adventurer 		Level 1 (Unlocks by level 61)
When Eureka is defeated, this skill grants the ally with the highest ATK other than Eureka ［Shield］ equal to 150% of Eureka’s ATK before any stat increases or decreases were applied to it for 4 turns (cannot be dispelled).
Level 2 (Unlocks by level 141)
Additionally, the size of ［Shield］ is further increased by 150% of Eureka’s ATK before any stat increases or decreases were applied to it for each enemy who is afflicted with ［X Mark］ (total max increase equal to 900% of her ATK before any stat increases or decreases were applied to it).
Level 3 (Unlocks by level 221)
Additionally, if the target who is granted ［Shield］ is an Azure Soul ally, increases the target’s ATK by 50% (cannot be dispelled).

Dreamy Adventurer provides a solid shield to your best attacker when Eureka is defeated. The ally with the highest damage power gets a shield that absorbs damage equal to 150% of Eureka's ATK for four turns. We can also note that you can't dispel or steal this shield.

This shield becomes even more vital if enemies with [X Mark] exist. For each enemy with [X Mark], the shield strength increases by 150% of Eureka's ATK, up to 900%. If the ally who gets the shield is an Azure soul ally, the ATK increases by 50% for four turns.

Eureka Best Runes

The rune allocation for this character is currently being evaluated for accuracy. Please stay tuned!
PVE
Offensive Runes
PVE
Defensive Runes
PVP
Offensive Runes
PVP
Defensive Runes
Recommended Runes
MAG Rune ImageMAG Rune ATK Rune ImageATK Rune Debuff ACC Rune ImageDebuff ACC Rune SPD Rune ImageSPD Rune
Recommended Runes
STA Rune ImageSTA Rune HP Rune ImageHP Rune M. DEF Rune ImageM. DEF Rune CRIT RES Rune ImageCRIT RES Rune
Recommended Runes
MAG Rune ImageMAG Rune ATK Rune ImageATK Rune Debuff ACC Rune ImageDebuff ACC Rune SPD Rune ImageSPD Rune
Recommended Runes
STA Rune ImageSTA Rune HP Rune ImageHP Rune M. DEF Rune ImageM. DEF Rune CRIT RES Rune ImageCRIT RES Rune

Prioritize ATK, Debuff ACC, MAG and HP Runes

Eureka should get the ATK rune since this significantly increases Eureka's ATK power, maximizing the damage output of her active skills. Debuff ACC rune ensures that [X Mark] is applied more consistently, crucial for triggering the massive damage multiplier at higher levels.

MAG rune increases the damage of both Carrot Magic and My Own Eureka Pace, making these skills more powerful. HP rune to help with survivability, ensuring Eureka can stay in the fight longer and make the most of her skills. You can include other defensive runes like M.DEF and CRIT RES.

Eureka Best Team Comps

Azure Soul Affinity Team

Tank Buffer Attacker Debuffer Debuffer
MementoMori - Amleth IconAmleth MementoMori - Sivi IconSivi MementoMori - Florence IconFlorence MementoMori - Eureka IconEureka MementoMori - Soltina IconSoltina

Amleth and Florence are capable of dealing massive damage to enemies. Sivi's defensive buffs and self-healing abilities ensure the team's survival, especially in long battles. Eureka and Soltina's debuffing abilities can significantly weaken enemies, making them easier to defeat. In addition to these skills, the soul bonus will take effect and have a 25% boost for HP and ATK.

Debuff-Heavy Team

Attacker /
Debuffer		 Buffer Attacker Debuffer Debuffer
MementoMori - Cordie IconCordie MementoMori - Merlyn IconMerlyn MementoMori - Serruria IconSerruria MementoMori - Eureka IconEureka MementoMori - Rusalka IconRusalka

Getting high-damage characters like Cordie and Serruria in a team allows it to deal massive damage to enemies. Merlyn's healing and buffing abilities, combined with Rusalka's protective shields and self-revival, ensure the team's survival. Eureka and Rusalka's debuffing abilities can significantly weaken enemies so that the high-damage characters can finish off the enemy team.

Eureka Skills and Stats

Carrot Magic

Skill Type Cooldown
Image File
Carrot Magic		 Active
4
Skill Effect
Level 1 (Unlocks by default)
“No need to panic~ Let’s just take it slow~” Deals 1 magical attack equal to 120% of Eureka’s ATK to 2 random enemies, and has a 50% chance to inflict［X Mark］ on all targets for 2 turns. ［X Mark］ decreases the damage an afflicted target deals by 10%.
Level 2 (Unlocks by level 81)
The magical attack’s damage becomes equal to 180% of her ATK.
Level 3 (Unlocks by level 161)
The chance to inflict ［X Mark］ becomes 70%.

My Own Eureka Pace

Skill Type Cooldown
Image File
My Own Eureka Pace		 Active
4
Skill Effect
Level 1 (Unlocks by level 11)
“I’m gonna take each step at my own Eureka pace~ So, don’t get in my way, okay~?” Deals 1 magical attack equal to 340% of Eureka’s ATK to 2 random enemies.
Level 2 (Unlocks by level 21)
The magical attack’s damage becomes equal to 440% of her ATK.
Level 3 (Unlocks by level 101)
Additionally, if a target is afflicted with ［X Mark］, the magical attack’s damage to that target becomes equal to 1760% of Eureka’s ATK.
Level 4 (Unlocks by level 181)
The targets of this skill become 3 random enemies.

On To New Frontiers

Skill Type Cooldown
Image File
On To New Frontiers		 Passive
Skill Effect
Level 1 (Unlocks by level 41)
“If an adventurer gives up, their journey ends, after all~” When Eureka is inflicted with a debuff from an active skill, this skill has a 70% chance of inflicting ［X Mark］ on 3 random enemies for 2 turns. ［X Mark］ decreases the damage an afflicted target deals by 10%.
Level 2 (Unlocks by level 121)
Additionally dispels 1 debuff each from Eureka and the 2 allies with the highest ATK.
Level 3 (Unlocks by level 201)
Additionally, if the debuff that is inflicted on Eureka is an action hindering debuff, the targets who are inflicted with ［X Mark］ become 5 random enemies.

Dreamy Adventurer

Skill Type Cooldown
Image File
Dreamy Adventurer		 Passive
Skill Effect
Level 1 (Unlocks by level 61)
“Keep trying hard for me, too~ I’ll leave the rest to you~” When Eureka is defeated, this skill grants the ally with the highest ATK other than Eureka ［Shield］ equal to 150% of Eureka’s ATK before any stat increases or decreases were applied to it for 4 turns (cannot be dispelled).
Level 2 (Unlocks by level 141)
Additionally, the size of ［Shield］ is further increased by 150% of Eureka’s ATK before any stat increases or decreases were applied to it for each enemy who is afflicted with ［X Mark］ (total max increase equal to 900% of her ATK before any stat increases or decreases were applied to it).
Level 3 (Unlocks by level 221)
Additionally, if the target who is granted ［Shield］ is an Azure Soul ally, increases the target’s ATK by 50% (cannot be dispelled).

Eureka Stats and Potential

Max Stats (Lv. 240)

HP 5,410,880
DEF 7
DEF Break 0
SPD 2,895
PM. DEF Break 0
P. DEF 568,836
M. DEF 714,514
ACC 284,418
EVD 274,012
CRIT 274,012
CRIT RES 270,544
CRT DMG Boost 0
P. CRIT DMG Cut 0
M. CRIT DMG Cut 0
Debuff ACC 0
Debuff RES 0
Counter 0
HP Drain 0

Max Potential (Lv. 240)

STR 568,836
MAG 714,514
DEX 548,025
STA 541,088

Eureka Exclusive Weapon

Travel Buddy - MementoMori.jpg
Travel Buddy
Level 1 (Unlocked by getting Eureka's unique weapon)
Strengthens Carrot Magic. The targets of this skill become 3 random enemies.
Level 2 (Unlocks at UR rarity)
At the start of the battle, this skill grants 1 layer of ［Multi-Barrier］ to Eureka (cannot be dispelled). If she takes damage, 1 barrier layer is depleted to nullify the damage.
Level 3 (Unlocks at LR rarity)
Strengthens My Own Eureka Pace. The magical attack’s damage becomes equal to 480% of her ATK. If a target is afflicted with ［X Mark］, the magical attack’s damage to that target becomes equal to 1920% of Eureka’s ATK.

Eureka Available Gachas

Eureka Invoke Banners

List of Gacha Banners
MementoMori - Prayer of The Fleeting
Prayer of The Fleeting
 		MementoMori - Invocation of Chance
Invocation of Chance

Eureka Arcana

Lepus 's Detection

MementoMori - Eureka IconEureka MementoMori - Tropon IconTropon

MementoMori Related Guides

Garmr - MementoMori

List of All Character Builds List of All Character Profiles
List of All How to Beat Articles

Character Build Lists

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Amber Characters Emerald Characters
Radiance Characters Chaos Characters
Character Builds by Type
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Sorcerer Type


All SR Rarity Character Builds

Soltina - MementoMoriSoltina Amleth - MementoMoriAmleth Fenrir - MementoMoriFenrir Florence - MementoMoriFlorence
Moddey - MementoMoriModdey Sabrina - MementoMoriSabrina Freesia - MementoMoriFreesia Amour - MementoMoriAmour
Rean - MementoMoriRean Dian - MementoMoriDian Ivy - MementoMoriIvy Merlyn - MementoMoriMerlyn
Cordie - MementoMoriCordie Nina - MementoMoriNina Mertillier - MementoMoriMertillier Mimi - MementoMoriMimi
Tropon - MementoMoriTropon Hathor - MementoMoriHathor Olivia - MementoMoriOlivia Primavera - MementoMoriPrimavera
Natasha - MementoMoriNatasha Lunalynn - MementoMoriLunalynn

All SR (Limited) Rarity Character Builds

Sage Merlyn - MementoMoriSage Merlyn Tillie - MementoMoriTillie Asahi - MementoMoriAsahi Artoria - MementoMoriArtoria
Eirene - MementoMoriEirene Winter Lunalynn - MementoMoriWinter Lunalynn Winter Soltina - MementoMoriWinter Soltina Eureka - MementoMoriEureka
Festive Natasha - MementoMoriFestive Natasha Meria - MementoMoriMeria Tama - MementoMoriTama Serruria - MementoMoriSerruria
Aine - MementoMoriAine Milla - MementoMoriMilla Summer Amleth - MementoMoriSummer Amleth Summer Nina - MementoMoriSummer Nina
Kaguya - MementoMoriKaguya Minasumari - MementoMoriMinasumari Alexandra - MementoMoriAlexandra Apostle Rosalie - MementoMoriApostle Rosalie
Lumica - MementoMoriLumica Ayse - MementoMoriAyse Treasured Cerberus - MementoMoriTreasured Cerberus Treasured Fenrir - MementoMoriTreasured Fenrir
Liebe - MementoMoriLiebe Mihri - MementoMoriMihri Carmilla - MementoMoriCarmilla Yildiz - MementoMoriYildiz
Ringmaster Cordie - MementoMoriRingmaster Cordie Nebra - MementoMoriNebra Spring Shizu - MementoMoriSpring Shizu Flack - MementoMoriFlack
Moineau - MementoMoriMoineau Lucille - MementoMoriLucille Uniform A.A. - MementoMoriUniform A.A. D.D. - MementoMoriD.D.
Potpourri - MementoMoriPotpourri Pola - MementoMoriPola Rustica - MementoMoriRustica Morgana - MementoMoriMorgana
Eir - MementoMoriEir Paladea - MementoMoriPaladea Yuni - MementoMoriYuni Matilda - MementoMoriMatilda
Liselotte - MementoMoriLiselotte Fenny - MementoMoriFenny Gil’uial - MementoMoriGil’uial Winter Tropon - MementoMoriWinter Tropon
Sonya - MementoMoriSonya Stella - MementoMoriStella Sivi - MementoMoriSivi Summer Cordie - MementoMoriSummer Cordie
Priscilla - MementoMoriPriscilla Artie - MementoMoriArtie Chiffon - MementoMoriChiffon Belle - MementoMoriBelle
Luke - MementoMoriLuke Claudia - MementoMoriClaudia Summer Sabrina - MementoMoriSummer Sabrina Fia - MementoMoriFia
Lea - MementoMoriLea Sophia - MementoMoriSophia Carol - MementoMoriCarol Veela - MementoMoriVeela
Winter Amour - MementoMoriWinter Amour Tainted Iris - MementoMoriTainted Iris Richesse - MementoMoriRichesse Summer Moddey - MementoMoriSummer Moddey
Fortina - MementoMoriFortina Elfriede - MementoMoriElfriede Rusalka - MementoMoriRusalka Cerberus - MementoMoriCerberus
Armstrong - MementoMoriArmstrong Ophelia - MementoMoriOphelia A.A. - MementoMoriA.A. Valeriede - MementoMoriValeriede
Witch Illya - MementoMoriWitch Illya

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