UMBRAL MONUMENT SEARING SCARS: AGONY MODE GUIDE

Ready to test your roster? The Umbral Monument is Arknights: Endfield’s premier endgame challenge. If you’ve hit Authority Level 30 and finished Chapter 1, it’s time to lock in.

The “Searing Scars” series features three deadly chambers, each with a Normal and Agony tier. Normal mode is your playground (items allowed!), but Agony mode is where the training wheels come off: no items, no natural SP regeneration, and absolutely no room for error.

For the full chamber lineup, enemy resistances, and Normal/Agony enemy levels across every series, cross-reference the Umbral Monument Database while you read.

TL;DR - Key Points

• Three chambers with Normal and Agony tiers – Agony prohibits tactical items and natural SP regen
• Chamber I: Sea of Loathing – Kill Cloud Stalkers first, destroy 3 anchors in 12 seconds
• Chamber II: Melting Point of Flesh – Cannot Perfect Dodge, use Lift to interrupt flamethrowers
• Chamber III: Howling Flame – Clear Heat stacks with Laevatain or Arts reactions at 3 stacks
• Stat benchmarks for Agony – 450 team AI, 8,500+ ATK main carry, 25,000+ HP supports
• Rewards: ~1,200 Oroberyl – Plus Marks of Perseverance for mastery and Trimmed Medal
• 10-minute timer is generous – Play mechanics, don’t rush

Chamber I: Sea of Loathing

The Vibe: Spatial Awareness and Priority Targeting

Boss: The Breaking Gust (The Bird)

Primary Gimmick: Roughly every minute, the boss seals one of your off-field operators in spectral chains. You have exactly 12 seconds to destroy three anchors around the arena. If you fail, that operator is KO’d instantly.

The Annoyance: Three Cloud Stalkers spew smoke that slows you down and disables your dodge.

Pro Tips

Kill the Stalkers First: Use Gilberta to gather them up and wipe them early so you aren’t fighting through thick smoke.

Go Ranged: Ranged operators like Yvonne or Fluorite make breaking the anchors trivial since they don’t have to chase them down.

MVP Units

Chamber II: Melting Point of Flesh

The Vibe: Positioning and Interrupt Discipline

Boss: Two Bonekrusha Arsonists with permanent flamethrowers

Agony Rule: You cannot perform Perfect Dodges. No I-frames for you.

Hazard: Exploding slugs that hunt you down.

Pro Tips

Lift is Life: The Arsonists are vulnerable to physical status effects. Chen Qianyu is the MVP here – use her battle skill to repeatedly Lift them, interrupting their flamethrower attack before it leaves fire pools on the floor.

Pre-trigger Slugs: Run toward the slugs to start their timer, then dash away before they blow.

Wheelchair Strategy: If you’re struggling, bring Ember. Her shields and on-demand healing let you “wheelchair” through the floor damage.

MVP Units

Chamber III: Howling Flame

The Vibe: SP Management and Elemental Logic

Boss: Hill Smasher (The Bull)

Gimmick: It enters an “Enraged” state and builds Heat Stacks. If it reaches 4 stacks, it clears them and does a room-wide explosive slam that deals unavoidable burn damage.

Agony Rule: While the boss is Enraged, natural SP regeneration is disabled. You only gain SP from basic attack finishers and dodges.

Pro Tips

Eat the Stacks: Use Laevatain! Her final strike “absorbs” the boss’s heat stacks, preventing the nuke entirely while fueling her own skills.

Elemental Reset: If you don’t have Laevatain, use an Arts Reaction (Electric, Cryo, or Nature) when the boss hits 3 stacks to reset his counter. Perlica or Estella are great for this.

Save Your SP: Don’t spam skills during the normal phase. Store at least 2 bars of SP for when the bull gets angry.

MVP Units

Quick-Reference Table

Stat Benchmarks for Agony Mode

If you’re hitting a wall, check your numbers. Level 90 Agony bosses are no joke.

Minimum Requirements

Understanding the AI Threshold

The 450 Arts Intensity requirement is critical. Dropping below this threshold triggers a 40% Physical Damage penalty across your entire team. This is often the hidden reason why Agony clears fail – you’re not just underpowered, you’re actively penalized.

What’s in it for You?

Clearing the series isn’t just for bragging rights (though that Trimmed Medal looks sweet).

Oroberyl

You can net roughly 1,200 Oroberyl through the event track. This is enough for approximately 12-15 pulls toward your next 6-star operator.

Mastery Materials

Marks of Perseverance are crucial for late-game character talent mastery. Each operator skill mastery (M1-M3) requires multiple Marks, making this one of the most valuable rewards.

The Flex

• Normal mode gives the currency
• Agony mode gives the Mark of Perseverance and the elite “Trimmed” medal

Bottom Line

Don’t rush. The 10-minute timer is generous. Play the mechanics, reset the stacks, and claim your rewards!

Team Composition Framework

Universal Support Picks

These operators work across all three chambers:

Elemental Coverage

Ensure your team has at least two different Arts elements for reaction-based stack resets:

• Heat: Laevatain, Ember, Wulfgard
• Electric: Perlica, Estella, Antal
• Cryo: Yvonne, Xaihi, Last Rite
• Nature: Chen Qianyu, Tangtang, Mi Fu

Common Mistakes to Avoid

1. Ignoring Cloud Stalkers in Chamber I – The smoke disable will cost you the chain mechanic
2. Spamming Dodge in Chamber II – Perfect Dodge is disabled; rely on Lift interrupts instead
3. Forgetting Heat Stack Count in Chamber III – Track the boss’s Enraged state and prepare your reaction
4. Under-leveled Support Operators – 25k HP is the minimum for survival in Agony
5. No Arts Reaction Coverage – Bring at least two elements for stack resets

Final Thoughts

The Searing Scars series is a skill check that rewards game knowledge over raw power. While meeting the stat benchmarks is important, understanding each chamber’s mechanics is the difference between a failed run and that sweet Trimmed Medal.

Take your time, learn the patterns, and remember: the 10-minute timer is there to prevent ultra-defensive stalls, not to rush you. Play smart, not fast.

Good luck, Endministrator!