Under Tides

Event

Synopsis

Rerun

Medals

Gallery

Trivia

This article is about the major event/Intermezzo. For the music, see Under Tides (music).

Under Tides (SV; not to be confused with Children of Ursus) is the twelfth major event, third Intermezzo, and the first Celebration event in Arknights.

Release date
CN	May 1, 2021 ~ May 15, 2021 (as Arknights CN's 2nd anniversary event)
Global	October 21, 2021 ~ November 4, 2021 (as the 2021 Gift of the Deep Ones event)
TW	January 26, 2022 ~ February 9, 2022

Operations

Clear 1-10 to access the SV (Under Tides) operations.

Deserted Salviento	SV-1 SV-TR-1 SV-2 SV-3 SV-4 SV-5 SV-6 SV-7 SV-ST-1 SV-8 SV-9 SV-ST-2
Choppy Ruin	SV-EX-1 SV-EX-2 SV-EX-3 SV-EX-4 SV-EX-5 SV-EX-6 SV-EX-7 SV-EX-8

Choppy Ruin operations are available in the event's second week.

All SV (Under Tides) operations are worth 28 .

Annihilation

Flooded Seashore is introduced as the new Rotating Mission in November 1, 2021.

From November 1, 2021 to November 29, 2021, all Hypothetical Targets (The Grand Knight Territory Outskirts, Frozen Abandoned City, and Abandoned Mine) are available.

Operators

The following Operators will gain 50% more Trust (except from Annihilation):

Gladiia Kal'tsit Skadi the Corrupting Heart Akafuyu

Headhunting

Main article: Headhunting/Banners/Former/2021

The third Celebration limited headhunting banner, Deep Drown Lament, is featured.

• A single  Song of the Sea Headhunting Permit can be claimed once while the Deep Drown Lament banner is up.
• Every day, the player can perform one headhunting pull for free at the Deep Drown Lament banner. These free pulls do not transfer over to the next day, so they must be used before the daily reset.

Note: Skadi the Corrupting Heart will be added into the Celebration limited Operators' pool on Stultifera Navis (late October 2022).

Corrupted Iberian Record

All Deserted Salviento operations award  Corrupted Iberian Record when cleared, with more being given when the player clears the operation for the first time. Choppy Ruin operations only awards Corrupted Iberian Records when cleared for the first time.

Corrupted Iberian Records can be exchanged for various items in Barter.

The best Deserted Salviento operations to farm Corrupted Iberian Records are SV-7, SV-8, and SV-9 due to their good  Orirock Cluster,  Crystalline Component, and  Integrated Device drop rates, respectively.

Try to Survive

The Try to Survive rewards can be claimed until November 11, 2021.

Mission	Reward
Clear SV-1.	30
Clear SV-2.
Clear SV-3.	40
Clear SV-4.
Clear SV-5.	40
Clear SV-5 with 3 stars.	60
Clear SV-6.
Clear SV-6 with 3 stars.
Clear SV-7.	60
Clear SV-7 with 3 stars.
Clear SV-8.	80
Clear SV-8 with 3 stars.
Clear SV-9.	80
Clear SV-9 with 3 stars.
Clear SV-EX-1.	30
Clear SV-EX-2.
Clear SV-EX-3.	40
Clear SV-EX-4.
Clear SV-EX-5.
Clear SV-EX-6.
Clear SV-EX-7.	80
Clear SV-EX-8.
Clear SV-EX-8's Challenge Mode.
Clear SV operations except SV-TR-1 15 times.	40
Clear SV operations except SV-TR-1 45 times.	60
Clear SV operations except SV -TR-1 85 times.	80

Barter

To buy all items with limited stock from Barter, the player must spend 6340 .

Try to Survive missions award 1080  while the first clear rewards of SV operations award 960 , thus requiring the player to farm 3900  from SV operations.

Barter is open until November 11, 2021.

Item	Price	Stock
1	250	1
	300
	350
	400
	450
1	150	3
1	100	5
1	45	10
1	40
1	35
	70	1
	65
	40
	20	2
1	13	10
1	12
5K	7	100
2	5	25
2	3	50
2	1	120
1	4	25
1	2	50
1	4	25
1	3
1
1	6	5
10	2	200
20	1	∞

Login Event

During the event, login to the game for 10 days to claim the following rewards.

Day 1	30K 2
Day 2	30K 2
Day 3	200 25
Day 4	1 10
Day 5	15 2
Day 6	1 5
Day 7	30K 200
Day 8	1 2
Day 9	1 15
Day 10	5

Store

ID Info Update Card Packs added into the Packs Store.

The following packs are available in the Packs Store until November 18, 2021:

Item	Content	Price
Rhodes Island Headhunting Pack	1	$29.99
Rhodes Island Resource Pack	90 1 200K 4 30 50 20 50	$49.99

• Note: Both packs can only be purchased once per account.

Outfits

The following outfits are available in the Outfit Store:

New	Burst Feline Forgemaster Dark Cloud Fugue Tested One Gorgeous Flower Speechless Sound Black Wave

In addition, players who had purchased Skadi's Waverider WR04 outfit before the event will receive one  Outfit Voucher (given as an in-game mail) due to the release of Skadi the Corrupting Heart.

Furniture

The Iberian Resort Town furniture set is available; some of its parts are awarded from completing Try to Survive missions while others are available in Barter and Furniture Store.

Miscellaneous

Operator Record/Paradox Simulation

New Operator Records/Paradox Simulations are added for the following Operators:

Operator	Operator Record(s)	Paradox Simulation
Earthspirit	Extra Work	A Line for Three
Mountain	Unexpected Annoyance	Immovable as His Name
Nightingale	A Song and a Blue Feather	Impregnable Illusion
Savage	Painful Reversal No Less Than A "Pie"	Ha! Through to the Front!
THRM-EX	Scorching-Hot Assault!	None

Cautus Valley Mining Area

During the event, the player will receive one mining operation every day, which can be used to receive  Orundum from three different types of Originium deposits in Cautus Valley Mining Area, selected at random in each use:

Deposit	Value
Originium Crude Ore	300
Originium Ore	400  ~ 1700
Originium Vein	1800

• The amount of Orundum received will only be shown after the mining operation is completed.
• If the mining operation does not reach an Originium Vein, the next mining operation(s) are more likely to reach it. If an Originium Vein was not reached by the end of the event, then the last mining operation is guaranteed to reach an Originium Vein.
• Unused mining operations do not transfer over to the next day, so they must be used before the daily reset.