Umbral Monument: Survive the Gas - Agony Mode Guide for Arknights: Endfield. It covers the best teams, how to defeat, key strategy, tips, recommended characters, and rewards.
Survive the Gas (Agony Mode) Best Teams
Laevatain Team
| DPS | Heat Application | Recover SP | HP Support |
  Laevatain |  Wulfgard |  Akekuri |  Ardelia |
This is a Heat-focused team built around Laevatain. Her Ultimate deals high-damage and wide-area Heat damage, allowing her to quickly eliminate multiple enemies, making her one of the most effective DPS options for Survive the Gas (Agony Mode).
Endministrator Physical Team
| DPS | DPS | Recover SP | HP Support |
 Endministrator |  Chen Qianyu |  Pogranichnik | Ardelia |
This is a Physical-focused team built around the Endministrator. It offers high single-target damage output but lacks wide-area attacks, which may result in slower clear times compared to the Laevatain team. Sustain the team’s survivability by maintaining HP through Ardelia’s Battle Skill and Ultimate healing.
Strategy and Tips for Survive the Gas
Prepare a Means of HP Recovery
| Best Characters with HP Recovery | ||
| Ardelia |  Ember |  Snowshine |
In Survive the Gas, a stage-specific mechanic will gradually drain the HP of all team members over time. Since recovery items cannot be used in Agony Mode, make sure to include a support unit with HP restoration effects, such as Ardelia, to offset the continuous HP loss.
 Tips! | The mechanic deals damage equal to 2.9% of each character’s Max HP every 3 seconds. Without any form of HP recovery, team members will be downed in approximately 1 minute and 45 seconds. |
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Use Gathering Skills to Group Enemies
| Characters with Gathering Skills | ||
 Gilberta |  Lifeng | Pogranichnik |
Many small enemies will spawn throughout the stage, so bringing a character with a gathering skill allows you to deal damage more efficiently. Prioritize grouping enemies together and hitting multiple targets simultaneously during combat.
Fight While Keeping an Eye on Allies' HP
Enemy attacks are powerful, and your allies' HP will decrease rapidly. Check the HP of characters you aren't controlling and switch between them as needed to heal and prevent them from being downed.
Avoid the Final Boss’s AoE Attacks
After defeating all small enemies, a boss will spawn. The boss frequently uses large-area AoE attacks, so carefully manage your positioning throughout the fight.
Best Characters for Survive the Gas
| Character | Role and Key Advantages |
| Laevatain | [Role]: Attacker [Key Advantages] - Excels at clearing grouped enemies with wide-area attack - Strong synergy with Gilberta and Ardelia - High-priority inclusion if available |
| Gilberta | [Role]: Gathering Supporter [Key Advantages] - Support unit with enemy-gathering Battle Skill - Applies Arts Susceptibility, ideal for Originium Arts teams |
| Ardelia | [Role]: HP Supporter [Key Advantages] - Restores the active character's HP with her Battle Skill and Ultimate - Provides strong offensive support through Physical and Arts Susceptibility |
| Ember | [Role]: HP Supporter [Key Advantages] - Support unit with multiple ally-healing abilities - Applies Knock Down, synergizing well with Physical teams - Also effective in Originium Arts teams when healing is the priority |
Survive the Gas Stage Information
| Series | Those Forsaken by the Land |
| Stage Mechanics | [Normal] All allies will continuously take damage When the controlled character receives healing, other characters will be healed for 70% of that amount [Agony] All allies will continuously take damage When the controlled character receives healing, other characters will be healed for 50% of that amount The use of Tactical items and consumables is prohibited |
| Appearing Enemies |        [Normal] Bonekrusher Ripptusk Elite Ripptusk Elite Ambusher Bonecrusher VanguardBonecrusher Siegeknuckles[Agony] Bonekrusher Ripptusk Hazefyre Tuskbeast Bonecrusher Vanguard Bonecrusher Infiltrator Bonecrusher Siegeknuckles |
| First Clear Rewards |      [Common for Normal & Agony] T-Creds x24,000 Advanced Cognitive Carrier x3 Mark of Perseverance x1 Protohedron x8 Arms INSP Set x5 |
Related Arknights: Endfield Articles
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