Under Tides

Event

Synopsis

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 and third Intermezzo in Arknights.

Taking place in an abandoned nomadic city in Iberia, Under Tides focuses on the Abyssal Hunters, namely Skadi and Gladiia, and gives insights concerning Aegir, Iberia, and the Hunters' true nature. it also reveals the existence of the Seaborns and their creeping threat to the surface world of Terra.

Release date
CN	May 1, 2021 ~ May 15, 2021
Global/EN	October 21, 2021 ~ November 4, 2021
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

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

Try to Survive missions' reward 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 .

Barter will remain available 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

Item	Price	Stock
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	∞

Sign-In Event

During the event, sign in 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

Headhunting

Main article: Headhunting/Banners/Former § 2021

The second 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.

Store

The following packs are available in the Packs Store:

Item	Content	Price
ID Info Update Card Pack		Free/$4.99
Rhodes Island Headhunting Pack	1	$29.99
Rhodes Island Resource Pack	90 1 200K 4 30 50 20 50	$49.99

Note: The ID Info Update Card Pack comes in two variants: a free one that can only be purchased once and a paid one that can be purchased multiple times; the ID Info Update Card from both will expire if not used within 180 days after being purchased. All other packs can only be purchased once.

Outfits

The following outfits are available in the Outfit Store until November 4, 2021:

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 until November 4, 2021; some of its parts are awarded from completing Try to Survive missions while others are available in Barter and Furniture Store.

Medals

Main article: Path to Glory/Event § Under Tides

Miscellaneous

Operator Record/Paradox Simulation

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

Earthspirit Mountain Nightingale Savage THRM-EX

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	300  ~ 1800
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 the 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.