Should You Pull for Eureka
MementoMori's Eureka is an SR (Limited) character available in the Prayer of Fleeting and Invocation of Chance. Read on to find out whether you should pull for her, when not to pull for her, where to pull for her, and other information.
List of Contents
Should You Pull for Eureka?
Pull if You Don't Have a Debuff Dispeller
Eureka's main use is for PvP, where she's supposed to remove your team's debuffs (for example, if they get silenced by Lunalynns). If you are not running any witches that can dispel debuffs in your team, Eureka could be a good option.
However, note that her ability to dispel debuffs depends on whether she gets debuffed herself - which may or may not happen in battle.
Good at One Copy... As Long As You Don't Use Her as a DPS
If you will use her strictly as a support, she can be useful even at one copy. She doesn't even need her Unique Weapon, Travel Buddy (unless you find that she tends to die too fast in battle, then you'll want to get the unique weapon at UR rarity for 1 stack of Multi-Barrier or get another unit that can protect her).
If you want to use her as an attacker, you'll need to raise both her and her weapon to at least LR rarity—this is necessary to unlock the 1920% damage on her second skill, My Own Eureka Pace. However, even then, her damage can be unreliable, as it depends on whether the enemy is debuffed with X Mark, which isn't guaranteed to happen during battle.
Pull If You Like Her Story
Eureka is a child fascinated with maps. She dreams of exploring the uncharted parts of the world. She believes the existing maps must be completed, and undiscovered lands are beyond the known world. She is passionate about discovering these unknown territories and creating a map that accurately represents the world.
When Not To Pull For Eureka
You Already Have a Witch that Dispels Debuffs
If you already have debuff dispellers such as Priscilla or Summer Nina, then it's not necessary to get Eureka. Unless you want a debuff dispeller that can also deal damage, that is. However, as we already mentioned, Eureka's ability to deal damage is partly random.
When You Are Just Starting
If you are a beginning player, we recommend getting standard characters that can help you with your Main Quest (such as Cordie, Florence, Merlyn, etc.) Getting Eureka (or most limited SR units) is not recommended, unless you happen to like her look or story - then we advise pulling for just one copy.
Eureka Builds: Best Runes and Team Comps
Will You Pull for Eureka?
Where to Pull for Eureka
Prayer of Fleeting Gacha
 |
|
|---|---|
| Start Date | May 6, 2025 |
| Duration | U.S.: 5/6 22:30~5/21 22:29 (UTC-7) E.U./Global: 5/7 6:30~5/22 6:29 (UTC+1) |
| Event Details | Eureka appears in the Prayer of Fleeting! |
Eureka is guaranteed to appear on the 100th pull. If you want to secure Eureka, prepare 30,000 Diamonds for 100 gacha pulls.
How to Efficiently Collect Diamonds
Invocation of Chance
 Invocation of Chance
|
|
| Name | Invocation of Chance |
|---|---|
| Duration | - |
| Status | Always Active |
| Main Feature | Character you set and Items will appear! |
| How to Unlock | Must clear Main Quest 11-28 or VIP 12 |
Eureka will be available in the Invocation of Chance as a Character of Chance during the same time she's available in the Prayer of the Fleeting banner.
Invocation of Chance Banner Guide
Premier Gifts for Eureka
Witch's Gift
Eureka has her own limited Witch's Gift available from May 6, 2025 until May 21, 2025. Witch's Gifts are gifts players can obtain when they reach a particular rarity for Eureka.
Each set of rewards players have unlocked had corresponding purchaseable items. Rewards include buffs, Witch's Letter, Ticket of Souls, and Rune Tickets.
Eureka Basic Info
| Eureka | |
|---|---|
 |
|
| PvE Rank | PvP Rank |
|
|
| Base Rarity | Soul | Type | Role |
|---|---|---|---|
| SR (Limited) |
 Azure
|
 Sorcerer
|
Debuffer |
MementoMori Related Guides
Current Available Witches
| Current and Upcoming Prayer of the Fleeting Banner Witches | |
|---|---|
| Witch | Info and Duration |
 Winter Lunalynn
(Rerun!) |
Banner Duration: December 3 - December 17 |
 Winter Soltina
(Rerun!) |
Banner Duration: December 3 - December 17 |
 Sage Merlyn
(New Character!) |
Banner Duration: November 27 - December 24 |
 Uniform A.A.
(Rerun!) |
Banner Duration: November 19 - December 3 |
 Winter Amour
(Rerun!) |
Banner Duration: November 27 - December 24 |
 Winter Tropon
(Rerun!) |
Banner Duration: November 27 - December 24 |
Sniper
Warrior
CrimsonCurrent Character Gacha Available
| Current Invocation of Star's Guidance Witches (Until December 17, 2025, 22:29 UTC-7) |
||
|---|---|---|
 Kaguya
|
 Milla
|
 Minasumari
|
Invocation of The Stars' Guidance Banner Guide
All Invocation Banners
| List of All Permanent Invocation (Gacha) Banners | |
|---|---|
 Recommended Gacha Banners |
|
 Prayer of The Fleeting |
 Prayer of The Cursed |
 Prayer of Friendship |
 Prayer of Soul |
 Prayer of Beginnings |
 Invocation of Chance |
 Invocation of The Stars' Guidance |
Chosen Prayer of The Fleeting |
All Invocation Simulators
| List of Invocation (Gacha) Simulators | |
|---|---|
 Prayer of the Cursed Simulator |
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