A-H.A (Atra-Hasis Ark) Conquest is the 22nd event in Blue Archive and the 2nd event with the Conquest mode. It is directly connected to the recently released Final. Chapter 3 of the main story as well as the sequel to F.SCT Battle Operation. As such, it is recommended to read all the other main story volumes and prequel chapters before reading this event story.

Notes: Players can still read the story from the Main Story tab if they missed it after the event period is over. Conquest is the only limited-time mode in this event.

Event Summary[edit]

Notice[edit]

Schedule[edit]

Japanese Version[edit]

Japanese name	A-H.A占領戦
English name	A-H.A Conquest
Event period	02/22/2023 11:00 — 03/08/2023 10:59
Reward exchange	02/22/2023 11:00 — 03/08/2023 10:59

Global Version[edit]

English name	The Ark of Atrahasis Conquest
Event period	08/22/2023 11:00 — 09/05/2023 10:59
Reward exchange	08/22/2023 11:00 — 09/05/2023 10:59

Add Final. Chapter 3 Episode 1-16.
New Limited Banner: Nagisa (★★★) and Toki (★★★).
Player must have completed Area 2-3 to participate.

Details[edit]

Summary

Final. Chapter 3, Episodes 1–15, will be available after maintenance. Episode 16 will be unlocked after completing A-H.A. Conquest.
This event entire gameplay including story revolve around the Conquest game mode. Please refer to Conquest for more details.
Achievement Mission and Exchange shop will be in this event.
Event Points Milestones will not be in this event.

Additional new separate content/updates alongside the Event:

Expand raid ranking cutoff.
Platinum: No. 1 ~ 15000 (+5000)
Gold: No. 15001 ~ 80000 (+15000)
Silver: No. 80001 ~ 180000 (+40000)
Bronze: No. 180001 onward.
Add another set of stock for T1-T4 Enhancement Stone to Shop.
Add Hanako and Koharu Eleph to Raid Shop. (Refresh in the next Raid)
New raid difficulty Torment.
New furniture interaction for Toki, Nagisa, and Koyuki.
Update item lineups for Bounty Shop.
Increase the drop rate of T2-T4 equipment blueprints in some Missions stages.

Future system in development:

Extra Stage in some Normal Mission stages where players can farm certain OOParts.
Area 22 in Mission stage.
New Schedule Location D.U.
New Tactical Challenge (PVP) Season and Terrain.
Renewed New Teacher Guide Mission Quest and Reward.
Permanent Guide Mission.
Archive of old Event Stories.

Conquest[edit]

For a guide on how to progress, check this General Progress and Upgrade Route Guide or Event Guide for Newbie for details. Credit to the anon who made it.

In this event, the event story will progress by advancing the Conquest mode. Conquest is a base-control event in which the goal is to steal the tiles in the event area before occupying the entire area.

Like the previous Conquest mode event, the OOPArts and BPs drop rate is incredibly high. Try to farm as much as you can.
This conquest event added a new system called Erosion. Check Erosion for more details.
Focus on farming event currency to buy Gate Unlock Code and rush to Area 3 or 4 as soon as possible, as those areas have the highest efficiency for event currency drops.
You can get 4Eligma by upgrading the Base Tile to Level 3. There are a total of 29 Base Tile in this event, upgrading all of them to max will give players a total of 116Eligma.
Upgrading all base tiles to Level 3 will cost a total of 4200, 4200, and 4110
If you have occupied all of the General Tiles and Base Tiles and upgraded all the Base Tiles to Level 3, you can earn 1,485,000 Credits per Occupation gauge.

General Mechanics[edit]

There are 3 types of tiles in the Conquest battle area:

General Tile: Occupying the tile requires AP; no battle.
Battle Tile: Requires AP to battle and occupy the tile. Can not be analyzed. Can not be upgraded.
Base Tile: Requires AP to battle and occupy the tile. Can be analyzed for rewards. Can be upgraded twice.

Once the Base Tile is occupied, players can Analyze the Tile by spending AP to obtain Multidimensional Computation Circuit, Dimensional Engine Parts, and Space Chocolate Burger. In order to Occupy and Analyze, players are required to assign teams for Battle and Analyze. Players can obtain bonus effects such as Battle Buffs and Reward Bonuses by assigning students to the specified schools.

There are 3 additional system beside Occupy and Analyze.

Occupation: is a function where players can earn credits as a reward when the AP gauge (500) is maxed out. The amount of credits that can be earned increases as players occupy more tiles and upgrade up their base tile.
Supply Box: A supply box is hidden in each area, and finding it will reward players with Pyroxene.
Erosion: Refer to Erosion for more details.

Battle Mechanics[edit]

Occupying General Tile costs 10AP.
Occupying Battle Tile costs 15AP.
Occupying Base Tile costs 20AP.
Players must defeat the mob with the same faction number as the Boss enemy before you can challenge them.
AP used to initiate a battle will be refunded if a player is defeated or gives up in a battle to occupy a Battle Tile or Base Tile.
The battle must be cleared with 3★ in order to Analyze on the Base Tile. If you clear the battle in 1★ or 2★, you can occupy the adjacent tiles but will not be able to analyze on the occupied Base Tile.

Analyze Mechanics[edit]

Assign students to a base tile to get drop bonuses for the event currency drop when analyzing the base.
Players can borrow Club & Friend students to assist in analyzing the Base Tile. There are no rental fees for this one.
Players can use the same students assigned to the analyzing team in combat team, and vice versa.
AP cost to analyze varies depending on the area, so please refer to in-game for more information.

Other[edit]

Spending AP outside of Conquest mode will not increase the Occupation gauge.
Reward for Supply Box, Occupation, and Event Mission can only be received during the Event period.
Some Base Tiles contain significantly fewer analyze rewards, but the upgrade costs are also lower at 45 Event Currency for Level 2 and 3.
The Credits amount for Occupation rewards will increase by 50% at Level 2, and 100% at Level 3. Obtain Eligma when the base tile levels up.
Base Tile can be upgraded up to Level 3. Each upgrade cost is different in each area, and certain tiles will use different event currencies. Refer to in-game for details.

Erosion[edit]

Erosion is a new system added to this event's conquest mode. There are two types of erosion: small-scale erosion and large-scale erosion.

Small-scale erosion will erode 3 random base tiles. Reset at 4:00AM (JST) every day.
Large-scale erosion will occur once the condition are met. A warning screen will flash onto the screen when the large-scale erosion occurs.

Erosion Mechanics[edit]

From the 2nd day, the occupied tiles may be eroded and stolen by the enemy.
When a tile is eroded, a Penalty will be incurred that prevents you from Analyzing the eroded base and reduces the credit amount when collecting Occupation rewards. Make sure to remove the erode tiles before collecting the occupation rewards!
In order to remove the penalty, you must perform a removal operation on the eroded tiles and win the battle.
Removing the erosion will earn you Credits, Enhancement Materials, and Pyroxene.
Removal operations can be performed using either the Analyze team or the Combat team.
Analyze Team does not requires AP to remove the erosion, but you will not be able to change the team set before the erosion. If the team has an "assist" unit, a separate rental fee will be incurred.
Combat Team requires AP to remove the erosion, but you can freely choose their team members. The same students from the analyze team can be used in the combat team.

Large-Scale Erosion[edit]

Before large-scale erosion can occur, a certain amount of AP must be spent to meet the Warning Condition.
A warning will then be displayed the next day (reset time) at the main event screen that indicates the Erosion Condition.
After meeting the erosion condition, large-scale erosion that erodes all base tiles will occur in the indicated area.
There are 3 Large-Scale Erosion. Only one large-scale erosion can happen at a time.
Although small-scale erosion only starts on the 2nd day, the warning condition for large-scale erosion can be met as early as the 1st day, meaning the First Erosion can occur on the 4th day, Second Erosion on the 7th day, and the Third Erosion on the 10th day of the event.
Large-scale erosion will not stack with small-scale erosion, so make sure to remove any existing erosion before spending AP as leaving them will cost you erosion removal rewards!

Condition[edit]

1st Large-Scale Erosion - Area 2
- Warning Condition: Spend a total of 3,000 or more AP.
- Erosion Condition: Spend a total of 4,000 or more AP and wait 48 hours.
2nd Large-Scale Erosion - Area 3
- Warning Condition: Spend a total of 6,000 or more AP.
- Erosion Condition: Spend a total of 7,000 or more AP and wait 48 hours.
3rd Large-Scale Erosion - Area 4
- Warning Condition: Spend 9,000 or more AP.
- Erosion Condition: Spend a total of 10,000 or more AP and wait 48 hours.

Tile Detail[edit]

Base Tile & Boss Tile
		Unoccupied Base Tile / Boss Tile. Cost 20AP to battle and occupy the tile.
		Occupied Base / Boss Tile Level 1. Base Occupation Credits rewards. Analyze AP Cost depend on the Area. Each upgrade cost is different in each Area. Refer to here for more details.
		Occupied Base / Boss Tile Level 2. Increase Occupation Credits rewards by 50%. Analyze AP Cost depend on the Area. Each upgrade cost is different in each Area. Refer to here for more details. Obtain 2Eligma after reaching this level.
		Occupied Base / Boss Tile Level 3. Increase Occupation Credits rewards by 100%. Analyze AP Cost depend on the Area. Max Level. Obtain 2Eligma after reaching this level.
Erode Tile
		Erode Base Tile / Boss Tile. Each erode tile applies a -50K credits penalty to the occupation reward. Analyze Team costs 0AP to battle and remove the erosion, but you can't change your team setup. Combat Team costs 20AP to battle and remove the erosion, but you can change your team setup. Obtain 10, 5, 5, 5, and 3 after removing the erosion.



Battle Tile & General Tile
		Unoccupied Battle / Challenge Tile. Cost 15AP to battle and occupy the Battle tile. Cost 5AP to battle and occupy the Challenge tile.
		Occupied Battle / Challenge Tile. This Tile cannot be upgrade.
		General Tile. No Battle. Cost 10AP to occupy the tile.
Other
		Supply Box hidden in General Tile. Random Spawn Position. Contain 30Pyroxene.

Note: After the event ends and becomes permanent, occupy cost for all tiles has been reduced to 5AP.

Mission Details & Rewards[edit]

Analyze Reward[edit]

Notes: On the JP server, there was a notation error where the Analyze Reward Bonuses had been applied to OOPArts as well, even though that was not intended.
After consulting with the staff, they decided to turn the notation error into a feature where, if the OOPArts drop, you will also receive an additional one as indicated.

In this base control type event, players will need to organize teams based on specific schools rather than characters, unlike in other event, making it easier to get the max bonus without requiring specific characters. The Maximum Reward Bonus in each Base Tile is 120%.

Due to the tile-based map, it is impossible to pinpoint the tile's position. As such, there will only be the analyze reward in each Area. For enemy details, we recommend you to check out the event page at Schale.gg.

Bonus Effect:

Battle Team Damage Buff = 2 / 4 / 6 Unit — 50% / 100% / 150%
Analyze Reward Bonuses = 2 / 4 / 6 Unit — 40% / 80% / 120%

Tile No.	AP Cost	Upgrade Cost	Analyze Reward
Tile No.	AP Cost	Upgrade Cost	Event Currency	Ooparts	Equipment BPs	School Bonus
1-A	5	45	3 3
1-B	5	45	3 3

Tile No.	AP Cost	Upgrade Cost	Analyze Reward
Tile No.	AP Cost	Upgrade Cost	Event Currency	Ooparts	Equipment BPs	School Bonus
1-A	5	45	3 3
1-B	5	45	3 3
1-C	5	45	3 3
2-A	12	150	10 10 4	130%T1 160%T2	1×100%, 1×20% 33.33% 33.33% 33.33% 1×60% 33.33% 33.33% 33.33%
2-B	12	150	4 10 10	130%T1 160%T2	1×100%, 1×20% 33.33% 33.33% 33.33% 1×60% 33.33% 33.33% 33.33%
2-C	12	150	10 4 10	130%T1 160%T2	1×100%, 1×20% 33.33% 33.33% 33.33% 1×60% 33.33% 33.33% 33.33%
3-A	12	180	12 12	130%T1 160%T2	1×100%, 1×20% 33.33% 33.33% 33.33% 1×60% 33.33% 33.33% 33.33%
3-B	12	180	12 12	130%T1 160%T2	1×100%, 1×20% 33.33% 33.33% 33.33% 1×60% 33.33% 33.33% 33.33%
3-C	12	180	12 12	130%T1 160%T2	1×100%, 1×20% 33.33% 33.33% 33.33% 1×60% 33.33% 33.33% 33.33%

Tile No.	AP Cost	Upgrade Cost	Analyze Reward
Tile No.	AP Cost	Upgrade Cost	Event Currency	Ooparts	Equipment BPs	School Bonus
1-A	5	45	3 3
1-B	5	45	3 3
1-C	5	45	3 3
2-A	15	240	16 7 7	130%T2 124%T3	1×100%, 1×50% 33.33% 33.33% 33.33% 1x75% 33.33% 33.33% 33.33%
2-B	15	240	7 16 7	130%T2 124%T3	1×100%, 1×50% 33.33% 33.33% 33.33% 1x75% 33.33% 33.33% 33.33%
2-C	15	240	7 7 16	130%T2 124%T3	1×100%, 1×50% 33.33% 33.33% 33.33% 1x75% 33.33% 33.33% 33.33%
3-A	15	300	20 10	130%T2 124%T3	1×100%, 1×50% 33.33% 33.33% 33.33% 1x75% 33.33% 33.33% 33.33%
3-B	15	300	20 10	130%T2 124%T3	1×100%, 1×50% 33.33% 33.33% 33.33% 1x75% 33.33% 33.33% 33.33%
3-C	15	300	10 20	130%T2 124%T3	1×100%, 1×50% 33.33% 33.33% 33.33% 1x75% 33.33% 33.33% 33.33%

Tile No.	AP Cost	Upgrade Cost	Analyze Reward
Tile No.	AP Cost	Upgrade Cost	Event Currency	Ooparts	Equipment BPs	School Bonus
1-A	5	45	3 3
1-B	5	45	3 3
1-C	5	45	3 3
2-A	20	450	30 5 5	112%T3 112%T4	1×100%, 1×20% 33.33% 33.33% 33.33% 1x30% 33.33% 33.33% 33.33%
2-B	20	450	5 30 5	112%T3 112%T4	1×100%, 1×20% 33.33% 33.33% 33.33% 1x30% 33.33% 33.33% 33.33%
2-C	20	450	5 5 30	112%T3 112%T4	1×100%, 1×20% 33.33% 33.33% 33.33% 1x30% 33.33% 33.33% 33.33%
3-A	20	600	40	112%T3 112%T4	1×100%, 1×20% 33.33% 33.33% 33.33% 1x30% 33.33% 33.33% 33.33%
3-B	20	600	40	112%T3 112%T4	1×100%, 1×20% 33.33% 33.33% 33.33% 1x30% 33.33% 33.33% 33.33%
3-C	20	600	40	112%T3 112%T4	1×100%, 1×20% 33.33% 33.33% 33.33% 1x30% 33.33% 33.33% 33.33%

Achievement Missions[edit]

No.	Mission	Reward
1	Occupy a base once	50kCredits
2	Occupy a base 3 times	60kCredits
3	Occupy a base 5 times	80kCredits
4	Occupy a base 10 times	90kCredits
5	Occupy a base 15 times	100kCredits
6	Occupy a base 20 times	110kCredits
7	Occupy a base 25 times	120kCredits
8	Occupy a base 30 times	130kCredits
9	Occupy a base 35 times	150kCredits
10	Occupy a base 45 times	160kCredits
11	Occupy a base 55 times	170kCredits
12	Occupy a base 65 times	180kCredits
13	Occupy a base 75 times	200kCredits
14	Occupy all of area 1	40Pyroxene
15	Occupy all of area 2	40Pyroxene
16	Occupy all of area 3	40Pyroxene
17	Occupy all of area 4	40Pyroxene
18	Own 1 Lv. 2 base	100kCredits
19	Own 3 Lv. 2 bases	100kCredits
20	Own 5 Lv. 2 bases	100kCredits
21	Own 10 Lv. 2 bases	200kCredits
22	Own 15 Lv. 2 bases	200kCredits
23	Own 20 Lv. 2 bases	200kCredits
24	Own 25 Lv. 2 bases	200kCredits
25	Own 29 Lv. 2 bases	300kCredits
26	Own 1 Lv. 3 base	30Pyroxene
27	Own 3 Lv. 3 bases	30Pyroxene
28	Own 5 Lv. 3 bases	30Pyroxene
29	Own 10 Lv. 3 bases	30Pyroxene
30	Own 15 Lv. 3 bases	30Pyroxene
31	Own 20 Lv. 3 bases	30Pyroxene
32	Own 25 Lv. 3 bases	30Pyroxene
33	Own 29 Lv. 3 bases	30Pyroxene
34	Defeat the area 1 boss	200kCredits
35	Defeat the area 2 boss	200kCredits
36	Defeat the area 3 boss	300kCredits
37	Defeat the area 4 boss	300kCredits
38	Clear Challenge 1 within 85 seconds	40Pyroxene
39	Clear Challenge 2 within 75 seconds	40Pyroxene
40	Clear Challenge 3 within 100 seconds	40Pyroxene
41	Clear Challenge 4 within 95 seconds	40Pyroxene
42	Clear Challenge 5 within 125 seconds	40Pyroxene
43	Complete 30 Achievement Missions	1Secret Tech Notes

Total Achievement Rewards
4M6001

Exchange Shop[edit]

Multidimensional Computation Circuit
Item	Cost	Stock	Subtotal
Yuuka's Eleph	25	50	1,250
Gate Unlock Code - Outer Ward 2	500	1	500
Mystery Stone Piece	3	100	300
Broken Mystery Stone	10	40	400
Repaired Mystery Stone	25	20	500
Intact Mystery Stone	50	5	250
Novice Activity Report	1	500	500
Normal Activity Report	10	100	1,000
Advanced Activity Report	40	25	1,000
Superior Activity Report	200	10	2,000
Beginner Tech Notes (Millennium)	7	50	350
Normal Tech Notes (Millennium)	12	35	420
Advanced Tech Notes (Millennium)	24	25	600
Superior Tech Notes (Millennium)	60	10	600
Beginner Tech Notes (Trinity)	7	50	350
Normal Tech Notes (Trinity)	12	35	420
Advanced Tech Notes (Trinity)	24	25	600
Superior Tech Notes (Trinity)	60	10	600
Speed Racing Game Machine	2,000	1	2,000
Dimensional Engine Parts	5	∞
Total			13,640

Dimensional Engine Parts
Item	Cost	Stock	Subtotal
Ayane's Eleph	25	50	1,250
Gate Unlock Code - Outer Ward 3	2,000	1	2,000
Wolfsegg Iron Ore	3	100	300
Wolfsegg Iron	10	40	400
Low-Purity Wolfsegg Steel	25	20	500
High-Purity Wolfsegg Steel	50	5	250
Lesser Enhancement Stone	1	200	200
Normal Enhancement Stone	4	50	200
Advanced Enhancement Stone	16	15	240
Superior Enhancement Stone	64	3	192
Beginner Tactical Training Blu-ray (Millennium)	20	20	400
Normal Tactical Training Blu-ray (Millennium)	40	15	600
Advanced Tactical Training Blu-ray (Millennium)	100	12	1,200
Superior Tactical Training Blu-ray (Millennium)	200	4	800
Beginner Tactical Training Blu-ray (Trinity)	20	20	400
Normal Tactical Training Blu-ray (Trinity)	40	15	600
Advanced Tactical Training Blu-ray (Trinity)	100	12	1,200
Superior Tactical Training Blu-ray (Trinity)	200	4	800
Space Chocolate Burger	5	∞
Total			11,532

Space Chocolate Burger
Item	Cost	Stock	Subtotal
Kayoko's Eleph	25	50	1,250
Gate Unlock Code - Central Ward	2,000	1	2,000
Voynich Manuscript Page	3	100	300
Damaged Voynich Manuscript	10	40	400
Annotated Voynich Manuscript	25	20	500
Intact Voynich Manuscript	50	5	250
Rusty Firing Pin	5	100	500
Intact Firing Pin	25	40	1,000
Chromium Firing Pin	100	20	2,000
Titanium Firing Pin	500	5	2,500
500Credits	1	∞
Total			10,700