Cosmos is the light raid of the Revan 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: コスモスHL
- HP: 2,000,000,000
- Defense: 20
- Blue Chest: 4m honors
Links
General Strategy
Cosmos deals around 50k light damage at battle start so make sure to have enough HP to survive it. It will also put all summons on cooldown and knock out all non Dark allies.
Cosmos has a meter called Power of Arbitration that swings between Red Arbitration and Blue Arbitration with a max of 10 for each. If either red or blue is fully maxed, it prepares the raid wipe Final Detonation. It moves by 1 towards red for every hit that deals 3m damage and it moves by 1 to blue for every 10 hits. The farther Cosmos is away from the center in either direction the stronger her normal attacks become and the less damage she takes. It is important to balance your attacks between the two to maintain being near the center.
There are two special attacks: Dual Cry and Tempest Attunement. Both will recieve slightly different effects and cancel requirements depending on the current power of arbitration. Under neutral alignment, they require 30 hits and 8 debuffs to cancel respectively. While leaning blue it becomes 5 CAs and 10 debuffs. While red they are 40 hits and 4 damage skills. Depending on your character setup, it may be advantageous to lean a specific direction to make it easier to deal with.
Beyond both specials inflicting rough debuffs, it is important to cancel them for two other reasons. One is that they increase the power of arbitration. The red and blue variants add +4 to their respective arbitration direction. For neutral, Dual Cry moves two to red and Temptest Attunement moves two to blue. The other reason is that each one raises the Arbitration level. This maxes at 3 where it will then call the raid wipe.
At 75%, 50%, and 25%, the trigger Sweeping Detonation is readied. This can not be cancelled. The debuffs can be prevented if you don’t take damage. A couple ways to get around this are by using Fediel
’s skill 1 Cursed Funeral
All Dark allies gain Shield (10,000) and Peace in Death 2.
(Peace in Death ends upon taking damage 2 times.)
, or Rei
’s skill 3 Cold Stare
Take control of all foes, inflicting Cold Stare 1 (Accuracy: g, 1T) on all foes.
. 75% sets the power of arbitration to level 8 Red and 25% sets it to level 8 Blue. After this occur, you want to quickly return the meter towards center either by turning off CAs for red or usiing multiple CAs in a row for blue.
Drops
These are the most notable drops from this raid. Any unlisted weapons are safe to fodder.
- Mat for uncapping Revan weapons and awakenings.
Incisio Unitatis  |
Massive light DMG to a foe (All allies gain Drain.)
Additional effect at 4★: All allies also gain Shield. |
|---|
|
Zion’s Garrison
|
Big boost to light allies’ DEF based on how low HP is |
|---|---|
|
Light’s Tempering
|
Small boost to light allies’ skill DMG cap / Small supplemental boost to skill DMG |
- Provides a solid defense boost via garrison and DEF awakening for skill mash comps.
- Good option for HP filler for Omega grids or Optimus grids lacking stronger components.
- 2 ATK have niche use for OTK setups or as a general replacement for Rinnes to provide an additional bit of skill damage.
Hyacintho Flamma |
Massive light DMG to a foe / Uplift effect to light allies
Additional effect at 4★: |
|---|
|
Golden Enforcement
|
Boost to Light allies’ ATK and DEF (Activates when either Light Omega or Light Optimus weapon skills have a boost of 280% or above) |
|---|---|
|
Zenith Strike: Light
|
Boost to Light allies’ C.A. DMG cap and normal attack DMG cap |
- Great source of normal cap up as well as the damge mod from ATK awakening.
- Competes with World Harps for the normal cap.
- Works better outside RB setups presently.
- Extremely rare item used for New World Foundation weapon ULBs and summon transcendence
Blue Chest Setups
Blue chests are awarded based on the amount of honors achieved in a raid maxing out at 99% chance at a raid specific amount of honors: 4m in the case of Revan raids. They typically 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.
Chaos Ruler
Chaos Ruler
provides lots of debuffs for cancelling omens. The ultimate mastery skills Bleak Disorder
2-hit elemental DMG to a foe.
Inflict elemental DEF Down (Stackable), Double Attack Rate Lowered (Stackable) (180s), and Triple Attack Rate Lowered (Stackable) (180s).
(When a foe has 12 or more debuffs: Activates upon normal attacks.)
and Flames of Chaos
Various debuffs to all foes.
in particular are highly valuable.
Basic Variant 
Reference
Notes
- Fediel is typically always used.
- Other slots will usually be Rei, Halluel and Malluel
, Lich
, Magus (Summer)
, Orologia
or Nier FLB
for the mix of debuffs, hit counts, and spammable CAs.
- Lich’s slot can also be Ilsa (Yukata)
, Orchid
, or Seox
. - Other options for general slots are Vajra (Summer)
, Kou
, Magisa (Summer)
, Tabina (Summer)
, Vikala
, or Cerberus
.
- Lich’s slot can also be Ilsa (Yukata)
Nier Variant 
Reference
Notes
- Rei’s skill 1 Alaya-Vijnana
Take control of another Dark ally, granting them Double Strike (Can’t be removed).
(Ends on recast.) is applied to MC to double effects from Bleak Disorder
2-hit elemental DMG to a foe.
Inflict elemental DEF Down (Stackable), Double Attack Rate Lowered (Stackable) (180s), and Triple Attack Rate Lowered (Stackable) (180s).
(When a foe has 12 or more debuffs: Activates upon normal attacks.) or to Fediel for more hit counts. She is also used to bypass the HP triggers via her skill 3 Cold Stare
Take control of all foes, inflicting Cold Stare 1 (Accuracy: g, 1T) on all foes.
. - Parazonium MH with Splitting Spirit
Convert caster’s HP to charge bar (3% charge bar for every 250 HP consumed, up to 100% charge bar).
(Consumes up to 50% of current HP.) is a great option to get echoes on demand for more hits. - Backline character can be swapped out for anyone that might be helpful after Nier dies for slower setups.
Ilsa Variant
Reference
Notes
- Alternative version using Ilsa (Yukata) and Vajra (Summer).
Magisa Variant
Reference
Notes
- Another variant using Magisa (Summer) and perms.
Yamato
Yamato
is a great class for V2 content to reduce the requirements of the triggers as well as offering a one time use omen cancel via Seasplitter
3-hit Elemental damage to a foe (4000% total / Damage cap: ~6,000,000 total (1st hit: ~1,500,000
2nd hit: ~2,000,000
3rd hit: ~2,500,000)).
Cancel all cancelable Omens.
(Can only be used when Yashiori (Multiplier: Perpetuity) lvl is 8 or higher and a cancelable Omen is active. Can’t be recast.)
.
Reference
Notes
- Rei skill 1 Alaya-Vijnana
Take control of another Dark ally, granting them Double Strike (Can’t be removed).
(Ends on recast.) on Fediel allows for an easy 14 hits and 6 debuffs per turn from her. - Rei’s skill 3 Cold Stare
Take control of all foes, inflicting Cold Stare 1 (Accuracy: g, 1T) on all foes.
is used to cross the 75% and 25% trigger.
- Yamato’s Seasplitter
3-hit Elemental damage to a foe (4000% total / Damage cap: ~6,000,000 total (1st hit: ~1,500,000
2nd hit: ~2,000,000
3rd hit: ~2,500,000)).
Cancel all cancelable Omens.
(Can only be used when Yashiori (Multiplier: Perpetuity) lvl is 8 or higher and a cancelable Omen is active. Can’t be recast.) helps clean up other difficult cancels like 5 CAs.
Berserker
Hades can burst down the raid using the 150 GM weapon Ereshkigal
thanks to it providing three turns of teamwide double strike via its CA. On top of that, Full Arsenal III
and Splitting Spirit
Convert caster’s HP to charge bar (3% charge bar for every 250 HP consumed, up to 100% charge bar).
(Consumes up to 50% of current HP.)
allow for two additional CAs from Eresh.
Standard Setup
Rotation
- Turn 1
- Nier
Transform the field into a world of death and love.
(World of Death and Love (20% ATK Up / 30% Bonus Dark DMG, Multiplier: Unique, 3t) to the Field Effect|field.) ,
Grant Beloved (4T) to caster and a Dark ally.
(Love’s Redemption 13 lowers by 2. Can’t grant Beloved to more than 1 other ally at a time.) =>
,
Grant a Dark ally C.A. Reactivation (1 time / Unremovable) (1 times).
(Love’s Redemption 13 lowers by 1.) => - Rei
Take control of another Dark ally, granting them Double Strike (Can’t be removed).
(Ends on recast.) => - Berserker
Extend the duration of all allies’ buffs by 1 turn. (Excludes 1-turn buffs.)
All allies gain two random buffs.
Gain Bloodzerker (Ends if HP is 25% or lower or upon recast).
Bloodzerker: When consuming 25% of current HP upon using charge attack: Gain ATK Sharply Boosted (50%, 1 times, Multiplier: Assassin, 1.5T). - Orologia
- Nier
- Turn 2
-
=> Berserker
-
- Turn 3
- Nier
Gain Eternal Vow (Multiplier: Perpetuity).
(Love’s Redemption 13 lowers by 4. Can’t be recast.
Can only be used after The Lovers Upright activates.)
- Nier
- Turn 4 (75% cross example)
- Rei
Take control of all foes, inflicting Cold Stare 1 (Accuracy: g, 1T) on all foes.
- Rei
- Turn 5
- Turn 6
Notes
- Rei 3
Take control of all foes, inflicting Cold Stare 1 (Accuracy: g, 1T) on all foes.
can be used to pass 75 or 8 debuffs.
- Use Green Potions on MC as needed to maintain Bloodzerker.
- Use Orologia’s skill 2 Nunc Distorqueo
to remove the defense buff if it comes up.
Six Variant
Rotation
- Turn 1
- Seox
Gain Adversity (20%, Multiplier: Seraphic, 3t).
Level 95:
Buff increased to Adversity (30%, Multiplier: Seraphic, 3t).
Also gain Bonus Dark DMG (60%, 3t). ,
Gain Full Hostility (1t) and Counter on Dodge (500%, 3 times, 1t).
Level 85:
Counter upgraded to Counters on Dodge/DMG (500%, 6 times, 3t).
Level 130:
When Heavenly Howl lvl is 6: Also gain Double Strike (Can’t be removed) (1T). - Rei
Take control of another Dark ally, granting them Double Strike (Can’t be removed).
(Ends on recast.) => - Nier
Transform the field into a world of death and love.
(World of Death and Love (20% ATK Up / 30% Bonus Dark DMG, Multiplier: Unique, 3t) to the Field Effect|field.) ,
Grant Beloved (4T) to caster and a Dark ally.
(Love’s Redemption 13 lowers by 2. Can’t grant Beloved to more than 1 other ally at a time.) =>,
Grant a Dark ally C.A. Reactivation (1 time / Unremovable) (1 times).
(Love’s Redemption 13 lowers by 1.) => - Berserker
Gain Bloodzerker (Ends if HP is 25% or lower or upon recast).
Bloodzerker: When consuming 25% of current HP upon using charge attack: Gain ATK Sharply Boosted (50%, 1 times, Multiplier: Assassin, 1.5T). ]
- Seox
- Turn 2
- Turn 3
- Turn 4
- Turn 5
- Berserker
- Rei
Switch positions with a sub ally.
(When switching with a Dark ally: Take control of the ally, granting them Moksha (30% ATK Up, guaranteed triple attacks, 20% DMG Cap Up, 30% Dodge Rate Up, and 50% DEF Down, Multiplier: Perpetuity).) - Narmaya
Gain Glasswing Waltz (1 times), Uplifted (10%, 3T), C.A. DMG Boosted (1 time) (60%), and C.A. DMG Cap Boosted (1 time) (30%).
,
Remove 1 buff from a foe.
Inflict Delay (Accuracy: 100%). ,
Switch to Freeflutter stance.
Gain Butterfly Effect (70%, 4T) and ATK Boosted (Narmaya) (5% (50% Max), Multiplier: Unique).
Self-inflict DEF Lowered (Can’t be removed) (20%, 3T).
Level 55:
Effect enhanced. ,
300%-350% Dark damage to a foe (Damage cap: ~780,000).
Inflict Kaleidoscope 4 (Accuracy: g, 4T).
Gain Guaranteed DA (2T) and TA Up (10%, 2T).
Level 75:
Effect enhanced.
Level 95:
Damage increased to 400%-450%.
No longer gain Guaranteed DA (2T).
TA Up (10%, 2T) changed to Guaranteed TA (2T). - Nier
Gain Eternal Vow (Multiplier: Perpetuity).
(Love’s Redemption 13 lowers by 4. Can’t be recast.
Can only be used after The Lovers Upright activates.)
- Berserker
- Turn 6
- Berserker
Convert caster’s HP to charge bar (3% charge bar for every 250 HP consumed, up to 100% charge bar).
(Consumes up to 50% of current HP.) - Nier
Grant Beloved (4T) to caster and a Dark ally.
(Love’s Redemption 13 lowers by 2. Can’t grant Beloved to more than 1 other ally at a time.) =>,
Grant a Dark ally C.A. Reactivation (1 time / Unremovable) (1 times).
(Love’s Redemption 13 lowers by 1.) =>
- Berserker
References
Notes
- Rei 3
Take control of all foes, inflicting Cold Stare 1 (Accuracy: g, 1T) on all foes.
can be used to pass 75 or 8 debuffs.
- Use Green Potions on MC as needed to maintain Bloodzerker.
- Use Dispel
Removes 1 buff from a foe.
to remove the defense buff if it comes up.
- If no Sleepyhead, make sure to to heal before before tanking the Turn 3 trigger.
Tyra Variant
Rotation
- Turn 1
- Rei
Take control of another Dark ally, granting them Double Strike (Can’t be removed).
(Ends on recast.) => - Nier
Transform the field into a world of death and love.
(World of Death and Love (20% ATK Up / 30% Bonus Dark DMG, Multiplier: Unique, 3t) to the Field Effect|field.) ,
Grant Beloved (4T) to caster and a Dark ally.
(Love’s Redemption 13 lowers by 2. Can’t grant Beloved to more than 1 other ally at a time.) =>
,
Grant a Dark ally C.A. Reactivation (1 time / Unremovable) (1 times).
(Love’s Redemption 13 lowers by 1.) => - Berserker
Gain Bloodzerker (Ends if HP is 25% or lower or upon recast).
Bloodzerker: When consuming 25% of current HP upon using charge attack: Gain ATK Sharply Boosted (50%, 1 times, Multiplier: Assassin, 1.5T). ]
- Rei
- Turn 2
- Turn 3
- Turn 4
- Turn 5
- Turn 6
- Berserker
Convert caster’s HP to charge bar (3% charge bar for every 250 HP consumed, up to 100% charge bar).
(Consumes up to 50% of current HP.) - Nier
Grant Beloved (4T) to caster and a Dark ally.
(Love’s Redemption 13 lowers by 2. Can’t grant Beloved to more than 1 other ally at a time.) =>,
Grant a Dark ally C.A. Reactivation (1 time / Unremovable) (1 times).
(Love’s Redemption 13 lowers by 1.) =>
- Berserker
References
Notes
Full Auto Blue Chest
Full Auto blue chest setups exist for Cosmos. They are prone to fail to blue chest due to the mechanics of the raid but can get far enough most of the time to make it worthwhile.
Shieldsworn
Reference
Notes
- Press Fediel’s skill 3 The Black’s Encroachment
The Field Effect|field is engulfed in the Malice of Despair.
(Can’t recast.) first turn. - Six/Orologia can be replaced be Halluel and Malluel or Azusa (Summer)
. - Lich can be replaced by Magus (Summer).
Chrysaor
Reference
Notes
- Press Fediel’s skill 3 The Black’s Encroachment
The Field Effect|field is engulfed in the Malice of Despair.
(Can’t recast.) first turn.
Kengo
Reference
Notes
- Press Fediel’s skill 3 The Black’s Encroachment
The Field Effect|field is engulfed in the Malice of Despair.
(Can’t recast.) first turn.
Chaos Ruler
Reference
Notes
- Press Fediel’s skill 3 The Black’s Encroachment
The Field Effect|field is engulfed in the Malice of Despair.
(Can’t recast.) and use a
first turn.