Sudden Roar of Oblivion Stage 3 Guide for Version 1.5
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Sudden Roar of Oblivion is the 3rd stage in Marked by Dark Shadows in Arknights: Endfield 1.5. See all info about Stage 3 of the Marked by Dark Shadows series, best teams, recommended characters, how to beat it, and all rewards in this guide!
Sudden Roar of Oblivion Stage 3 Info
Sudden Roar of Oblivion Stage 3 Details
| Recommended Operator Lv. | ||
|---|---|---|
| Normal Mode Lv. 60 |
Agony Mode Lv. 90 |
|
| The time is up. Let the endless cycles of oblivion begin. | ||
Sudden Roar of Oblivion Stage 3 Mechanics
| Normal | Operators no longer have SP regeneration. After the battle begins, operators' starting SP and Max SP are increased to 1000. Tuskbeast Blightshades and YSTF Vanguard Blightshades will self-detonate after a while, dealing DMG based on Max HP to all operators. The YSTF Glaiver Blightshade must be interrupted several times to stop the casting of his ultimate skill. DMG from this ultimate skill cannot be dodged. When the battle takes too long, the YSTF Glaiver Blightshade will self-detonate and defeat every operator. When enemies become Staggered, their self-detonation timer pauses. Enemies have the same resistance against every element. |
|---|---|
| Agony | Operators no longer have SP regeneration. Final Strikes and Finisher attacks no longer recover SP. After the battle begins, operators' starting SP and Max SP are increased to 1000. Tuskbeast Blightshades and YSTF Vanguard Blightshades will self-detonate after a while, dealing DMG based on Max HP to all operators. The YSTF Glaiver Blightshade must be interrupted several times to stop the casting of his ultimate skill. DMG from this ultimate skill cannot be dodged. When the battle takes too long, the YSTF Glaiver Blightshade will self-detonate and defeat every operator. When enemies become Staggered, their self-detonation timer pauses. Tacticals and consumables cannot be used. |
Agony Mode adds an effect on top of the Normal Mode mechanics.
Sudden Roar of Oblivion Stage 3 Enemy Details
| Enemies |  |
 |
 |
 |
 |
|---|---|---|---|---|---|
| C | D | D | C | D | |
| C | D | D | D | D | |
| C | D | D | C | D | |
| C | D | D | D | D |
Tuskbeast Blightshade
YSTF Vanguard Blightshade
YSTF Elite Blightshade
YSTF Glaiver BlightshadePart of the Marked by Dark Shadows Series
 |
|
| Release Date | October 5, 2026 |
|---|---|
Sudden Roar of Oblivion Stage 3 Best Teams and Characters
Yvonne Solidification Team
| Main DPS | Support | Flex | Support |
|---|---|---|---|
 Yvonne
|
 Arcane
(Will)  Gilberta
|
 Tangtang
 Alesh
|
 Xaihi
|
This team allows you to gather enemies using Arcane or Gilberta's skill and deal AoE damage with Yvonne's battle skill as well as her Combo Skill right after she does a Final Strike. Tangtang can provide more DPS for the final fight, inflict Cryo Infliction, and keep the boss from moving with her ultimate if it's available.
Xaihi's ult can be used to increase your damage output at the end of the fight when you're using Yvonne's ultimate to finish the boss off. Just be sure that your Yvonne combo skill is up before using Arcane/Gilberta's battle skill.
Dual Vanguard Setups
| Support | Main DPS | SP Gen. | SP Gen. |
|---|---|---|---|
 Perlica
|
 Zhuang Fangyi
|
 Arclight
|
Alesh
|
| Main DPS | Sub DPS | SP Gen. | SP Gen. |
 Laevatain
|
 Wulfgard
|
 Camille
|
 Akekuri
|
These teams rely heavily on generating as much SP using Vanguards before the final fight. The damage from their respective main DPS's ultimate should be enough to defeat it.
Typhoeus Dual DPS
| DPS | DPS | Support | Support |
|---|---|---|---|
 Typhoeus
|
Arcane
(INT) |
 Liino
Xaihi
|
Gilberta
|
Typhoeus/Arcane Dual DPS can be used in this stage since Arcane INT can deal with the mob of enemies using her AoE attacks while Typhoeus can finish the final boss off with her single-target damage.
For the first three waves, group the enemies up using Gilberta's battle skill, then use Arcane's Combo Skill and her Battle Skill to finish them off. By the time you reach the final wave, Typhoeus will be able to finish him off.
How to Beat Sudden Roar of Oblivion Stage 3
Plan Out Your SP Usage
As you only have a limited amount of SP at this stage, you will have to plan out your Battle Skills as you clear each wave.
For example, on Yvonne's team, you can simply use Gilberta or Arcane's Battle Skill to apply Nature Infliction, as well as grouping the enemies before using Yvonne's Battle Skill to proc her Combo Skill to clear out the wave with it.
This lets you save at least 400 SP during the final encounter, and with their ultimates up, should be enough to defeat the boss.
Vanguards Can Still Generate SP
While you cannot generate SP naturally or from final strike, Vanguard Operators can still provide SP through their skills. This can help you get enough SP to use a battle skill should you need it for the final fight.
Dodging also helps generate some SP if you need that last bit of SP for a combo skill chain.
Sudden Roar of Oblivion Stage 3 Rewards
Total Item Rewards
| Mode | Rewards |
|---|---|
| Normal |
 T-Creds
x24,000 Protohedron
x8 |
| Agony |
T-Creds
x24,000 Protohedron
x8 |
Advanced Cognitive Carrier
Mark of Perseverance
Arms INSP SetArknights: Endfield Related Guides
Current Series and Stages
| Murmurs of the Deep Forest Series | |
|---|---|
 Critters That Dig (Stage 1) |
 Shadows That Bind (Stage 2) |
 Woodcrafts That Link(Stage 3) |
 Hatred That Sprawls (Stage 4) |
All Umbral Monument Series
 Murmurs of the Deep Forest |
Marked by Dark Shadows |
 Howlers of the Crag |
 Contention of Deathly Silences |
 Turbidity Manifest |
 Searing Scars |
 Inorganic Construct |
 Those Forsaken by the Land |
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Sudden Roar of Oblivion Stage 3 Guide for Version 1.5
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