Celeste Ater Omega is the dark raid of the M3 series. This guide will go over the basic details of the fight as well as setups for fighting it. For more detailed mechanics information, please check the wiki.
Overview
Information
- JP Name: セレスト・アーテルマグナ
- HP: 1,084,000,000
- Defense: ??
- Blue Chest: 1,232,496 honors
Links
Drops
These are the most notable drops from this raid. Any unlisted weapons are safe to fodder.
- Mat for converting to Ater Omega Anima.
- Used for uncapping M3 weapons and trranscending Omega summons.
Void Coruscation  |
Massive dark DMG to a foe / Remove 1 buff / Hit to debuff resistance
Additional effect at 4★: |
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Omega Exalto Caliginis
|
20% boost to Mistfall’s weapon skills |
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Mistfall's Might III
|
Big boost to dark allies' ATK |
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Mist's Vivification
|
Boost to ATK and DMG cap based on how many weapons with Mistfall's weapon skills are equipped |
- Core weapon for M3.
- 20% boost to Omega weapon skills and 2% EX and 1% cap up per weapon with an Omega skill slotted.
- Very easy to reach 20% cap up with them.
- 3-4 copies will cover general uise. 5 is for usage with Super Lucilius keys.
- Single sided Super Lucilius key setups not available until the Dark Primarch character releases.
Miasmic Tear |
Massive dark DMG to a foe / Remove 1 buff / Blind effect
Additional effect at 4★: |
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Mistfall's Tempering III
|
Big boost to dark allies' skill DMG cap / Big supplemental boost to skill DMG |
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Mistfall's Verity
|
Small boost to dark allies' critical hit rate |
- Omega Big Tempering and small crit.
- Skill damage boost from tempering is generally worth using over skill cap break sources.
- Crit component is ignorable.
Savage Rend |
Massive dark DMG to a foe / Remove 1 buff / Restore all allies’ HP
Additional effect at 4★: |
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Mistfall's Precocity II
|
Medium boost to dark allies' critical hit rate and healing cap |
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Mistfall's Garrison II
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Medium boost to dark allies' DEF based on how low HP is |
- Medium crit, medium Healing Cap, and medium Garrision.
- Solid defensive option thanks to healing cap and garrison.
- Crit component is ignorable.
Conditional Loot
Celeste Ater Omega features a new kind of chest drop. The Conditional Chest’s drop rate will increased based on the player’s in the raid being able to meant a specific condition. Conditions can be completed multiple times for multiple stacks. Each stack on the chest indicates a 10% chance for the chest to drop maxing at 100% at 10 stacks.
For Ater, the condition is to hit 30 times with normal attack damage or hit 30 times with skill damage in a turn. This is both easy for burst setups with all the echo stacking present in nehan setups and FA as most strong FA characters have strong skill damage focus.
Completing the condition provides a boost of honors. If you can not blue chest the raid, you can aim for the conditional chest and get a solid amount of honors just from doing that.
Blue Chest Setups
Blue chests are awarded based on the amount of honors achieved in a raid maxing out at 99% chance at raid specific amount of honors: 1,232,496 in the case of Celeste Ater Omega. They contain the most desirable drops in a raid such as the weapon drops. When farming a raid, this is the chest you want to aim for. The typical strategy is to deal the blue chest amount and then moving onto the next raid. Below is a list of strategies on how to effectively and quickly achieve blue chests.
These setups are oriented towards players with stronger grids and characters.
Chrysaor 
Rotation
- Turn 1
- Beelzebub
- Seruel (Summer)
Gain C.A. Reactivation (1 time).
All allies gain C.A. DMG Boosted (Stackable / Can’t be removed) (20% (100% Max)) and C.A. DMG Cap Boosted (Stackable / Can’t be removed) (10% (50% Max)). - Horus (Summer)
- Beelzebub
Reference Video
Luchador
Rotation
- Turn 1
- Beelzebub
- Tweyen
Gain Other Self 1 (1 times) and ATK Up (3T).
Level 55:
Buff increased to ATK Up (50%, Multiplier: Perpetuity, 3T).
Level 85:
Also gain Skill DMG Cap Boosted (30%, 3T). - Ferry (SSR)
All allies gain TA Up (100%, 4T) and Bonus Light DMG (30%, 4T).
Inflict Shorted (4T) on all allies.
(Consumes 100% of all allies’ charge bars.) - Nehan
All other Light allies gain Zen (Multiplier: Perpetuity, 3T).
,
All other Light allies gain Double Strike (1t).
(Inflict Max HP Lowered (Stackable / Can’t be removed) (30% (90% Max)) on target allies.) - Tag Team
All allies instantly perform a normal attack without using up a turn.
- Beelzebub
Notes
- Can replace Ferry with most other echo buffers.
- May need to run Yatima
and call Artemis
if running a weaker buffer. - If running someone other than Ferry, replace support summon with Luminiera Omega
- May need to run Yatima
Manadiver 
Rotation
- Turn 1
or Shiva
- Secret Triad
Fill 3 charge diamonds on all foes.All allies gain Bonus DMG (20%, 3T), Charge Boost (30%), and 1 Elemental Crest (Hellfire Crest 1Deluge Crest 1Wasteland Crest 1Typhoon Crest 1Aurora Crest 1Oblivion Crest 1).(Crest gained based on caster’s element.)
- Nehan
All other Light allies gain Zen (Multiplier: Perpetuity, 3T).
All other Light allies gain Double Strike (1t).
(Inflict Max HP Lowered (Stackable / Can’t be removed) (30% (90% Max)) on target allies.) - Mugen (Halloween)
All Light allies gain Light ATK Up (30%, 5T), Critical Hit Rate Boosted (20%, 5T), DMG Cap Boosted (15%, 5T), and DMG Amplified (20%, 5T).(Inflict Max HP Lowered (Stackable / Can’t be removed) (30% (90% Max)) on target allies.)
Notes
- For faster rooms, can cut Mugen 2 for Lumi or Nehan 1 for Zeus.
Full Auto
Players can also choose to full auto their own host. While it is slower than blue chesting, it is an easy way to get another drop chance with minimal effort. The following strategies focus on soloing the raid which is particularly helpful for slow periods. But it is strongly reccomended to call up backup request after securing a good blue chest chance to speed up the clear.
Lumberjack
Reference Videos
Manadiver
Reference Videos