TURBIDITY MANIFEST: UMBRAL MONUMENT GUIDE

The Turbidity Manifest arrives May 8, 2026, bringing six stages of escalating challenge.

TL;DR - Key Points

• Turbidity Manifest launches May 8, 2026 at 12:00 server time across all regions
• Six stages with Normal and Agony difficulty modes; Agony unlocks the trimmed medal
• Unlock requirement: Complete Chapter I Process II + Authority Level 30
• Limited event window: May 8 – May 22, 04:00 server time for bonus rewards
• Key rewards: Mark of Perseverance medal, Advanced Cognitive Carriers, Arms INSP Set, Protohedrons
• Preparation priority: Authority 30 grind, team composition audit, sanity booster stockpiling

Related read: Endfield Playtime: Dailies vs Factory Time goes deeper on endgame.

When and How to Access

Server Launch Times:

• Asia Server (UTC+8): May 8, 12:00
• Americas / Europe Server (UTC-5): May 8, 12:00 (local server time)

Permanent availability means no rush—but the limited-time event rewards absolutely demand your attention before May 22.

Unlock Requirements:

• Complete main mission [Chapter I Process II: Paving the Way]
• Authority Level ≥ 30

If you’re below Authority 30, you have a few days to grind. Prioritize your highest-yield stages and burn those sanity boosters.

See also: Contingency Contract Prep: CC Strategy Guide for more on endgame.

What Is the Turbidity Manifest?

The Umbral Monument is Endfield’s premier challenge mode—think Arknights’ Contingency Contract but tuned for the factory fortress. Each series introduces a thematic set of stages with unique mechanics, escalating enemy compositions, and brutal stage hazards. For a complete cross-series reference of every battle stage and enemy roster, see the Umbral Monument Database.

The Turbidity Manifest follows this formula with six distinct stages. Each stage has two modes:

• Stage 3: Tidal Grief — Ardelia solo cheese strategy
• Stage 5: Blood Debased — Imbued Quillbeast boss guide
• Stage 6: Cryostatic Connection — Tidalklast boss guide

The gap between Normal and Agony is where accounts get separated. Normal tests whether you’ve built functional teams. Agony tests whether you’ve built optimized teams—and whether you understand the stage mechanics at a fundamental level.

Rewards Breakdown – What You’re Fighting For

Base Completion Rewards (All Stages)

Completing every challenge stage in the Turbidity Manifest rewards you with:

• Mark of Perseverance – The coveted medal for your profile. Trimmed version if you clear Agony.
• Advanced Cognitive Carrier – High-tier material for skill upgrades. Never enough of these.
• Arms INSP Set – A full set of weapon enhancement materials. Significant value for anyone still building signatures.
• Protohedron – Because you can never escape the protohedron grind.

Limited-Time Event: Monumental Etching – Corrupting Surge

Event Period: May 8, 12:00 – May 22, 04:00 (server time)

This two-week window adds extra reward tiers for completing various Umbral Monument challenges. Think of it as a battle pass specifically for the event—clear stages, earn tokens, claim rewards.

The exact reward table is available in the in-game Event Center, but expect additional upgrade materials, possibly exclusive furniture or profile customization items.

Crucial note: The event ends on May 22 at 04:00 server time. After that, the Turbidity Manifest remains permanently available, but the bonus rewards vanish. If you want maximum value, clear everything within the first two weeks.

Preparation Checklist – What You Should Be Doing Right Now

With less than a week until launch, here’s how to ensure you’re not caught off guard.

1. Authority Level Grind

Authority 30 is the gate. If you’re below it, stop everything else. Run your highest-yield stages for Authority XP. Story missions, side content, anything that moves the needle. Missing the event launch because you ignored Authority requirements is a preventable tragedy.

2. Check Your Team Compositions

Six stages likely means multiple team requirements. Unlike some events that let you reuse the same four operators, Umbral Monument series often demand variety—different damage types, different survivability tools, different utility needs.

Audit your roster:

• Do you have at least two fully functional teams?
• Are your supports at a reasonable investment level (Level 70-80, key skills maxed)?
• Do you have coverage for physical and arts damage?

3. Stockpile Sanity Boosters

You’ll be retrying stages. Possibly a lot. Agony mode is designed to punish mistakes, and sometimes the only answer is brute force stat-checking—which requires leveled operators, which requires sanity.

If you’ve been hoarding sanity boosters “for a rainy day,” it’s raining.

4. Review Past Umbral Monument Mechanics

Hypergryph tends to reuse and remix mechanics across series. If you played previous Umbral Monument iterations, refresh your memory on:

• Stage hazards (tiles that damage, slow, or debuff)
• Enemy types (elite spawn patterns, boss mechanics)
• Victory conditions (survival, DPS race, objective defense)

The Turbidity Manifest will introduce new twists, but foundational knowledge carries over.

5. Don’t Sleep on Protohedrons

Protohedrons appear in the reward list for a reason. Masteries are expensive, and Agony mode likely expects certain skill level thresholds. If you’ve been procrastinating on M3 for key operators, this is your wake-up call.

Difficulty Expectations – What “Agony” Actually Means

The community has debated “fully built” definitions for months. Turbidity Manifest’s Agony mode will settle that argument.

Normal mode should be comfortable for any player with Level 80 operators, skill level 9 on relevant abilities, and halfway decent artifacts. You might need a few retries to learn stage layouts, but it won’t feel unfair.

Agony mode is where the game stops holding your hand. Expect:

• Enemy stats inflated to demand near-optimal gear rolls
• Stage mechanics that punish sloppy positioning
• Multiple elite enemies spawning simultaneously
• Timers or DPS checks that fail if your team lacks coherent synergy

Players who skipped masteries on supports because “they don’t need them” will feel the pain. Players who stopped at Level 80 instead of pushing to 90 will notice the damage gap. Players who ignored essence optimization will wonder why their clears take twice as long.

That said, Agony mode is designed to be possible without whaling. Skill and strategy close the gap more than raw stats. But raw stats help.

Medal Trimming – Why You Want the Trimmed Version

The engraved medal for completing all Normal stages is a nice trophy. The trimmed medal for completing all Agony stages is a statement.

In Arknights, trimmed medals became the informal measure of a player’s endgame capability. The same will happen here. When future recruitment or co-op features arrive, that trimmed medal tells other players you’ve been through the wringer and came out the other side.

Also, let’s be honest—it looks better on your profile.

Resource Management During the Event Window

The two-week limited event creates a natural pressure to complete stages quickly. But don’t burn yourself out.

Strategy recommendation:

• Week 1 (May 8-14): Clear all Normal stages. Learn the mechanics. Identify which stages will be problematic in Agony.
• Week 1.5: Start attempting Agony stages. Focus on the easiest one first to build confidence.
• Week 2: Push for full Agony clear. Use guides if you’re stuck (but try to solve it yourself first—that’s the point).
• Final days (May 20-22): Mop up any remaining challenges. Double-check event reward track for anything you missed.

Spreading your attempts across two weeks prevents rage-spending sanity boosters on failed runs. Walk away, rethink your team comp, come back fresh.

Final Verdict – Must-Play Content for Endgame Oriented Players

The Turbidity Manifest isn’t revolutionary. It’s more Umbral Monument, which is exactly what the game needed. Six stages, two difficulties, a trimmed medal, and a two-week limited event to light a fire under everyone.

For casual players: Clear Normal, get your engraved medal, grab the limited event rewards you can reach without banging your head against Agony. No shame in that.

For dedicated players: Agony or bust. The trimmed medal is the whole point. Treat this as your benchmark—if you can’t clear all six Agony stages, you have clear gaps in your account progression. Identify them and fill them.

For new players who just hit Authority 30: You’re going to struggle. That’s okay. The permanent availability means you can come back in a month with better teams. But at least attempt Normal mode—the rewards are worth the effort.

Mark your calendars for May 8. Stock your sanity boosters. Double-check your masteries. And get ready to prove that your “fully built” teams actually mean something.

The Turbidity Manifest is coming. Don’t let it wash over you.

Check the in-game Event Center on May 8 for the full reward track and additional details. Clear everything. Trim that medal.