Survival Training Event Guide
All 8 Stages, Unlock Schedule, Mechanics & Reward Breakdown
Last updated: Stage 7 "Feral Gall" added April 15, 2026.
Complete guide to the Survival Training limited challenge event in Arknights: Endfield (April 9–30, 2026). All 8 stage names and unlock schedule, full Stage 1 and 2 walkthroughs, reward breakdown including Advanced Progression Selection Crate I, and Trimmed Medal requirements.
* TL;DR - Key Points
- * Event runs April 9–30, 2026 — speak to Klara at Hub Base (Valley IV) to unlock
- * 8 stages total — stages 1 & 2 available from day one; Stage 3 NOW LIVE; stages 4–8 unlock daily from April 12 at 04:00
- * Each stage has a unique mechanic — not stat scaling; understanding the gimmick is the challenge
- * Stage 1: venom pools spawn at enemy death locations — kill at range, cluster with Gilberta
- * Stage 2: kill Firemist Slug to pull enemies into a pile, then detonate Industrial Explosives
- * Per stage rewards: Oroberyl ×200, Mark of Perseverance ×1, unique material, T-Creds ×40,000
- * Stage 8 only has a timer — required for Trimmed Medal (cosmetic); all other stages are untimed
Contents
Event Overview
Survival Training is a limited challenge event running April 9 – April 30, 2026. To access it, speak to Klara at Hub Base in Valley IV — she unlocks all available stages with no prerequisites beyond reaching the region.
There are no lives or attempt limits. Every stage can be re-run freely until the event ends. What makes Survival Training distinct is that each of the 8 stages introduces a unique mechanical hazard, not a harder version of the same fight. Adapting to the mechanic is the challenge.
8 Stages
Each with a distinct mechanic — not just scaling stats
1,600+ Oroberyl
200 per stage × 8 stages from first clears
No Attempt Limit
Re-run any stage freely until April 30
Stage Unlock Schedule
| # | Stage Name | Unlock |
|---|---|---|
| 1 | Like Draws Like | April 9 — event launch |
| 2 | Explosion Practice | April 9 — event launch |
| 3 | Outlast the Bugs | April 11, 04:00 server time |
| 4 | Coordinated Demolishing | April 12, 04:00 server time |
| 5 | Bad Neighbor | April 13, 04:00 server time |
| 6 | Castle Doctrine | April 14, 04:00 server time |
| 7 | Feral Gall | April 15, 04:00 server time |
| 8 | Final Assessment | April 15, 04:00 server time |
Note: April 15 Has Two Unlocks
Stages 7 and 8 both unlock on April 15 at 04:00. The rest of the event (through April 30) is available to clear them at your own pace. Stage 8 is the only stage with a time limit, and only for the Trimmed Medal.
Rewards Breakdown
Per-Stage Rewards
| Stage | Fixed Rewards | Stage Material |
|---|---|---|
| 1 — Like Draws Like | Oroberyl ×200, Mark of Perseverance ×1, T-Creds ×40,000 | Protoprism ×50 |
| 2 — Explosion Practice | Oroberyl ×200, Mark of Perseverance ×1, T-Creds ×40,000 | Advanced Combat Record ×25 |
| 3 — Outlast the Bugs | Oroberyl ×200, Mark of Perseverance ×1, T-Creds ×40,000 | Arms INSP Kit ×25 |
| 4 — Coordinated Demolishing | Oroberyl ×200, Mark of Perseverance ×1, T-Creds ×40,000 | Protoprism ×50 |
| 5 — Bad Neighbor | Oroberyl ×200, Mark of Perseverance ×1, T-Creds ×40,000 | Advanced Cognitive Carrier ×25 |
| 6 — Castle Doctrine | Oroberyl ×200, Mark of Perseverance ×1, T-Creds ×40,000 | Protoprism ×50 |
Event Completion Rewards
Expert Survivor — cosmetic profile portrait, awarded on full clear
Engraved Medal — clear all 8 stages (any attempt count, no timer)
Trimmed Medal — clear Stage 8 within the time limit; upgrades the medal's appearance (cosmetic only)
Advanced Progression Selection Crate I — open via Valuable Stash; pick one of five Tier 5 materials
Advanced Progression Selection Crate I — Choices
- • 2× Metadiastima Photoemission Tube
- • 2× D96 Steel Sample 4
- • 2× Tachyon Screening Lattice
- • 2× Quadrant Fitting Fluid
- • 2× Triphasic Nanoflake
Pro Tip: Mark of Perseverance
Mark of Perseverance is a 5-star Skill Mastery upgrade material. With 8 stages each yielding one, Survival Training provides 8 total — a significant chunk of the late-game mastery grind. They're also available via Bond Quota Exchange at 25 Bond Quota each, but the event rate is far better.
Stage 1: Like Draws Like
Last updated: Stage 5 "Bad Neighbor" added April 13, 2026.
The Mechanic: Venom Pools
When a Tunneling Nidwyrm or Indigenous Pincerbeast dies, it leaves a venom pool at its exact death location. The pool deals ongoing damage and applies Slow to any units standing in it — including your own operators. Where you kill enemies matters as much as how fast you kill them.
Enemies
| Enemy | Key Behavior |
|---|---|
| Tunneling Nidwyrm | Drops a venom pool on death |
| Indigenous Pincerbeast | Frontal cross-cut and leaping claw (Physical); Originium clusters glow before attacks; drops a venom pool on death |
| Acid Originium Slug | No venom pool — additional pressure only |
Strategy
Kill at Range
Use ranged attackers like Yvonne or Wulfgard to kill Nidwyrms and Pincerbeasts from a distance. When they die, the venom pool appears at their location — not yours. You never walk through it.
Cluster With Gilberta
Gilberta's Battle Skill pulls all nearby enemies into a tight cluster. Kill the cluster in one spot and all venom pools concentrate there. The rest of the battlefield stays clean. This is the cleanest solution — the pools accumulate in one designated zone and your team moves freely everywhere else.
The worst outcome is letting enemies scatter and die across the entire map — venom pools block every chokepoint and your team stumbles through Slow debuffs for the rest of the fight.
Stage 2: Explosion Practice
Objective: Use Industrial Explosives to defeat attacking enemies and protect the supplies.
The Mechanic: Industrial Explosives + Firemist Slug
Industrial Explosives are throwable weapons that deal AoE damage and destroy destructible walls, Blight cores, and boxes. Your job is to use them efficiently — which means grouping enemies first.
The Firemist Originium Slug is the grouping tool. In this stage, when a Firemist Slug dies, it drags all nearby enemies toward its corpse. This is a stage-specific mechanic, not normal enemy behavior. Kill the Slug when enemies are nearby, let the pull cluster them, then detonate.
Enemies
| Enemy | Key Behavior |
|---|---|
| Bonekrusher Pyromancer | Ranged caster; escalating fireball volleys (1 → 2 → 3); teleports forward when approached in melee; 0.5× Heat damage taken |
| Bonekrusher Ripptusk | Fast; pauses briefly mid-path in this stage |
| Bonekrusher Raider | Standard melee attacker |
| Bonekrusher Ambusher | Standard attacker |
| Firemist Originium Slug | Slow; on death, drags nearby enemies toward its corpse (stage-specific mechanic) |
Strategy
Firemist Slug Is Your Crowd Control
Don't rush the Slug immediately. Wait until other enemies are near it, kill the Slug to trigger the corpse pull, then throw your explosive into the clustered group. The pull is wasted if enemies are scattered when the Slug dies.
Pyromancers Teleport Forward, Not Away
When you approach a Pyromancer in melee range, it teleports forward along its path — it repositions ahead, not backward. Chasing it wastes time. Use ranged attacks or throw an explosive at its new position instead.
Exploit the Ripptusk Pause
Ripptusks pause briefly at a midpoint in this stage. Pre-place an explosive at that spot before they arrive. They run in, stop — detonate. No chasing required.
Pro Tip: Heat Teams Have a Handicap Here
Bonekrusher Pyromancers take 0.5× Heat damage. Laevatain-based teams will underperform on that specific enemy. Physical or Electric compositions have no such handicap and are the safer pick for Stage 2.
Stages 3–8: What to Expect
Stage 3, 4, 5, 6 & 7 NOW LIVE
Outlast the Bugs (Stage 3) live since April 11. Coordinated Demolishing (Stage 4) live April 12. Bad Neighbor (Stage 5) live April 13. Castle Doctrine (Stage 6) live April 14. Feral Gall (Stage 7) live April 15.
Stages 4–8 unlock daily from April 12. Full walkthroughs will be added as each stage goes live. Based on stage names and the mechanic-per-stage pattern, here's what each likely involves:
Coordinated Demolishing
Unlocks April 12The word "Demolishing" suggests explosive mechanics may return, possibly with multi-objective coordination — multiple targets or timed detonations.
Bad Neighbor
NOW LIVE — April 13Objective: Defeat all enemies to earn victory.
The Mechanic: Position the Axe Armorbeast so itscharge ram hits the Acid Originium Slug, applying Staggered. Use Finisher DMG and/or ramming to defeat the Slug. The Slug's charge mechanics require careful positioning to exploit its vulnerability window.
Castle Doctrine
NOW LIVE — April 14Objective: Use Industrial Explosives to defeat attacking enemies and protect the supplies.
Rewards: Oroberyl ×200, Mark of Perseverance ×1, Protoprism ×50, T-Creds ×40,000.
The Mechanic: When killed, Indigenous Pincerbeast continuously deals DMG to nearby enemies (DoT corpse). When killed, Firemist Originium Slug pulls in nearby enemies. Chain these effects: kill Pincerbeast to create damage zone, then kill Firemist Slug to pull enemies INTO that zone.
Strategy: Protect supplies first by pre-placing explosives near crates. Kill Pincerbeasts away from your operators. Use Firemist Slug pulls to feed enemies into Pincerbeast death zones for maximum efficiency.
Feral Gall
NOW LIVE — April 15Objective: Defeat all enemies to earn victory.
The Mechanic: Position the Axe Armorbeast so its charge rams the rock, applying Staggered to itself. Then use Finisher DMG to defeat the beast. Unlike Stage 5 where the Armorbeast rams an enemy, here you redirect its charge into terrain to create the vulnerability window.
Final Assessment
Unlocks April 15The hardest and most comprehensive stage. The only stage with a time limit — required to earn the Trimmed Medal. Likely combines mechanics from earlier stages. Bring your highest-output team.
Common Mistakes & How to Avoid Them
1. Standing near dying enemies in Stage 1
If you're adjacent to a Nidwyrm or Pincerbeast when it dies, your team walks straight into the freshly spawned venom pool. Fix: kill at range. Keep your operators away from the death location.
2. Letting enemies scatter before killing Firemist Slugs
The Slug's corpse pull only groups enemies that are already nearby. If you kill the Slug when enemies are spread out, the pull barely helps. Fix: bait enemies toward the Slug first, then kill it.
3. Chasing Pyromancers into melee
The Pyromancer teleports forward (ahead) when you get close in melee — it doesn't flee backward. You waste time repositioning and it resets its fireball sequence. Fix: ranged attacks or explosives only.
4. Attempting Stage 8 without understanding the mechanics
Stage 8 has a time limit only for the Trimmed Medal, but it's still the hardest stage. Clear stages 3–7 first to understand the event's mechanic patterns. Fix: work through stages in order, don't skip straight to 8.
5. Using Heat teams against Pyromancers in Stage 2
Bonekrusher Pyromancers take 0.5× Heat damage — half the expected output. Laevatain will significantly underperform on this specific enemy. Fix: run Physical or Electric for Stage 2, or swap DPS for that encounter.
6. Forgetting to open the Advanced Progression Selection Crate I
The event completion crate is opened via the Valuable Stash menu — it's not automatically granted. After clearing all 8 stages, go there to pick your Tier 5 material before the event ends.
Quick Reference Checklist
Frequently Asked Questions
How do I unlock Survival Training in Arknights: Endfield?
Speak to Klara at Hub Base in Valley IV. She grants access to all available Survival Training stages. The event runs April 9 – April 30, 2026. There are no unlock prerequisites beyond reaching Valley IV.
When do all 8 Survival Training stages unlock?
Stages 1 (Like Draws Like) and 2 (Explosion Practice) are available from April 9. Stage 3 (Outlast the Bugs) is NOW LIVE as of April 11. Stages 4–8 unlock one per day at 04:00 server time: Coordinated Demolishing (April 12), Bad Neighbor (April 13), Castle Doctrine (April 14), Feral Gall and Final Assessment (both April 15).
What rewards does Survival Training give?
Each of the 8 stages awards Oroberyl ×200, Mark of Perseverance ×1 (Skill Mastery material), T-Creds ×40,000, and a stage-specific material. Completing all 8 stages earns an Expert Survivor portrait, an Engraved Medal, and an Advanced Progression Selection Crate I (choose one of five Tier 5 materials). Clearing Stage 8 within the time limit also earns the Trimmed Medal.
How do I get the Trimmed Medal in Survival Training?
Clear Stage 8 (Final Assessment) within its time limit on a single run. The Trimmed Medal is cosmetic prestige only — it upgrades the Engraved Medal's appearance and carries no additional material rewards. All other 7 stages have no time constraint.
What is the Advanced Progression Selection Crate I?
A reward crate earned by clearing all 8 Survival Training stages. Open it via the Valuable Stash menu and choose one of five Tier 5 materials: Metadiastima Photoemission Tube, D96 Steel Sample 4, Tachyon Screening Lattice, Quadrant Fitting Fluid, or Triphasic Nanoflake. Pick whichever your current build needs most.