STAGGER SYSTEM
Complete Guide to Stagger Value, Finishers, Thresholds, and Cooldowns
Last updated: 2026-04-26
Master the stagger system in Arknights: Endfield. Learn stagger value accumulation, Finisher mechanics, stagger thresholds, cooldown penalties, SP recovery, and optimization strategies. Based on documentation by 666bj, translated by sten.
* TL;DR - Key Points
- * Stagger immobilizes enemies and applies 1.3x damage increase (Stagger Frailty) -- universal across all tiers
- * Accumulate Stagger via skill hits, status effects, or interrupting charges -- check skill panels for base values
- * Finisher coefficients scale by enemy: Common 1.0x, Advanced 1.25x, Elite 1.5x, Boss 1.75x
- * Finisher SP recovery: +25 / +35 / +50 / +100 SP by enemy tier -- chain Battle Skills during stagger
- * Elite/Boss stagger thresholds provide 2.5s partial stagger windows for burst before full stagger
- * Post-stagger cooldown penalty applies 50% stagger reduction (1s Common → 10s Boss)
- * Only Swordmancer set provides +20% Stagger Efficiency -- Laevatain/Yvonne cannot execute in Ultimate
Contents
1. How Stagger Accumulates
The enemy's Stagger gauge appears below their health bar. Operators accumulate Stagger value through three primary methods. Base Stagger values for skill-based accumulation are visible on the operator's skill panel.
Method 1: Skill Hits
Operator skills that hit enemies accumulate Stagger value:
- Final Strike -- last segment of Normal Attack chain
- Combo Skills -- all except Chen Qianyu
- Battle Skills
- Ultimate Skills
Base Stagger value is directly viewable on the operator's skill panel.
Method 2: Status Effects
Applying [Lift] or [Knockdown] to enemies accumulates additional Stagger value. These effects come from specific operator skills and reactions.
Method 3: Interrupting Enemy Charges
When enemies activate certain skills, they enter a charging state marked by a warning aura. Dealing damage with any skill during this phase interrupts their action, causing them to halt and accumulate Stagger value.
Common interrupt values: 15 or 20 points
Higher values possible: 60, 100, or more (enemy-specific)
Pro Tip: Enemy-Specific Mechanics
Certain enemy mechanics can cause extra Stagger value accumulation beyond the standard methods. Enemy-specific values vary -- check in-game for specific enemies you encounter.
2. Stagger Value Formula
Stagger value accumulated by operators against enemies is enhanced by Stagger Efficiency Bonus.
Calculation
Accumulated Stagger Value = Base Stagger Value × (1 + Stagger Efficiency Bonus)
Stagger Efficiency Sources
Currently, only one source provides Stagger Efficiency Bonus:
| Source | Bonus |
|---|---|
| Swordmancer Set | +20% |
With Swordmancer equipped: Base Stagger 10 → 12 accumulated. This applies multiplicatively across all three accumulation methods.
3. Stagger State
When Stagger Value reaches maximum threshold, enemies enter Stagger State for a set duration.
Effects During Stagger State
- Enemy cannot act -- all enemy skills and attacks are suspended
- 30% increased damage taken -- Stagger Frailty Multiplier applies to all incoming damage
Stagger Frailty Value
| Condition | Multiplier |
|---|---|
| Not staggered | 1.0x |
| Staggered | 1.3x |
All enemies share the 1.3x coefficient. This is a separate multiplier category from Damage Bonus stagger effects (e.g. Perlica's +30% talent).
Pro Tip: Burst During Stagger
Stack your highest-damage skills during the stagger window to maximize the 1.3x Frailty multiplier. Combine with Susceptibility, Fragility, and other debuffs for multiplicative gains.
4. Finishers
When an operator performs their first Normal Attack on a staggered enemy, they perform a Finisher -- dealing massive damage and restoring SP. Finisher damage is classified as Basic Attack damage.
Finisher Damage Formula
Finisher Damage = Base Damage Multiplier × Finisher Damage Coefficient
Benefits from Basic Attack bonuses and the operator's normal attack level
Finisher Damage Coefficients by Enemy Tier
| Enemy Tier | Coefficient |
|---|---|
| Common Enemies | 1.0x |
| Advanced Enemies | 1.25x |
| Elite Enemies | 1.5x |
| Boss Enemies | 1.75x |
This coefficient partially compensates for high-tier enemies' excessively high stagger thresholds. Since Finisher damage counts as regular Basic Attack damage, use highly-leveled operators to maximize the benefit.
Finisher Restrictions
Laevatain and Yvonne cannot execute enemies while in their Ultimate state. Plan rotations to exit Ultimate before the stagger window for Finisher execution.
Pro Tip: Use High-Level Operators
Finishers are Basic Attack damage -- they scale directly with operator ATK and level. Use your main DPS operator for the execution to maximize damage and SP recovery benefit.
5. Finisher SP Recovery
Dealing Finisher damage restores SP, known as Finisher Energy Recovery. This compensates for skill energy consumed during stagger accumulation and enables faster Battle Skill deployment while enemies are staggered.
| Enemy Tier | SP Recovery |
|---|---|
| Common Enemies | +25 SP |
| Advanced Enemies | +35 SP |
| Elite Enemies | +50 SP |
| Boss Enemies | +100 SP |
Strategy: Chain Skills During Stagger
Finisher SP recovery on bosses (+100) can instantly enable a Battle Skill or Ultimate. Time your Finisher to trigger skill chains during the stagger window for maximum burst output.
6. Stagger Thresholds
Elite and Boss enemies can possess stagger thresholds. When Stagger value reaches these thresholds, the enemy's action is interrupted and they stagger briefly.
How Thresholds Work
Thresholds correspond to specific percentages of the enemy's maximum Stagger Value. These are visible in the game's database. The default stagger duration is 2.5 seconds.
Example: Marble Aggelomoirai
Stagger nodes at: 33% and 66% of Stagger value cap
Default stagger duration: 2.5 seconds
Note: This is not an equal three-way division -- the nodes are at 33% and 66% specifically.
Pro Tip: Use Thresholds for Burst Windows
Partial staggers from thresholds give you 2.5 seconds of immobilization and 1.3x damage increase -- even before full stagger. Time your burst skills at threshold points for additional damage windows.
7. Post-Stagger Cooldown
If an enemy enters Stagger State within a very short timeframe, accumulated Stagger value applied to that enemy will be reduced by 50% for a period after the state ends. This prevents rapid re-staggering.
| Enemy Tier | Trigger Window | Cooldown Duration | Reduction |
|---|---|---|---|
| Common | Within 3 seconds | 1 second | 50% |
| Advanced | Within 6 seconds | 3 seconds | 50% |
| Elite | Within 10 seconds | 5 seconds | 50% |
| Boss | Within 15 seconds | 10 seconds | 50% |
If you stagger an enemy, immediately trigger another stagger skill during the cooldown window, you waste 50% of that accumulation. Time stagger triggers to avoid overlapping cooldowns.
8. Common Mistakes & How to Avoid Them
1. Wasting Multiple Stagger Triggers in Quick Succession
Post-stagger cooldown applies 50% reduction. Triggering another stagger skill immediately after a stagger ends wastes half the accumulated value. Fix: Wait for the cooldown window to expire before re-staggering.
2. Ignoring Finisher SP Recovery
Boss Finishers give +100 SP, enough to instantly enable a Battle Skill or Ultimate. Fix: Chain your highest-SP-cost skills immediately after executing on bosses.
3. Using Low-Level Operators for Finishers
Finishers are Basic Attack damage -- they scale with operator ATK and level. Using a support operator for execution wastes the damage potential. Fix: Always use your main DPS for the Finisher Normal Attack.
4. Confusing Stagger Frailty with Stagger DMG Bonus
Stagger Frailty (1.3x) is a separate multiplicative layer from Damage Bonus stagger effects like Perlica's +30%. Both apply simultaneously. Fix: Understand that staggered enemies take 1.3x from Frailty PLUS any additive stagger DMG bonus from gear/skills.
5. Using Laevatain/Yvonne Ultimates Before Stagger Window
Both operators cannot execute during Ultimate state. If you enter Ultimate and then stagger the enemy, you miss the Finisher entirely. Fix: Stagger first, execute, then activate Ultimate during the stagger window.
6. Over-Investing in Stagger Efficiency
Only Swordmancer set provides Stagger Efficiency (+20%). Beyond this, there are limited sources. Fix: Prioritize overall DPS and stagger accumulation skills over chasing efficiency that doesn't exist.
7. Ignoring Stagger Thresholds on Elite/Boss Enemies
Partial staggers from thresholds provide 2.5s of immobilization and 1.3x damage increase. Fix: Time your burst skills at threshold points for additional damage windows before full stagger.
Quick Reference Checklist
Frequently Asked Questions
How do you stagger enemies in Arknights: Endfield?
Stagger accumulates through three methods: hitting enemies with skills (Final Strike, Combo, Battle, Ultimate), applying Lift or Knockdown status effects, or interrupting enemy charge phases marked by warning auras. Once the stagger gauge fills, the enemy enters Stagger State.
What is Stagger Frailty and how much damage increase does it give?
Stagger Frailty is a universal 1.3x damage multiplier applied to all enemies while staggered. This is a separate multiplicative category from Damage Bonus stagger effects like Perlica's +30% talent.
How does Finisher damage work and what are the coefficients?
Finishers trigger on the first Normal Attack against a staggered enemy. Damage coefficients by enemy tier: Common 1.0x, Advanced 1.25x, Elite 1.5x, Boss 1.75x. Finishers count as Basic Attack damage and scale with operator ATK.
How much SP do Finishers restore?
Finisher SP recovery scales by enemy tier: Common enemies give +25 SP, Advanced give +35 SP, Elite give +50 SP, and Boss enemies give +100 SP. This enables faster Battle Skill deployment during stagger windows.
What are stagger thresholds and how do they work?
Elite and Boss enemies can have stagger thresholds — partial stagger points (e.g. 33% and 66% of the cap) that interrupt enemy actions with a 2.5 second stagger. This allows burst damage windows before achieving full stagger.
Why does stagger feel weaker after I stagger an enemy?
Post-stagger cooldown mechanics apply a 50% stagger reduction for a duration based on enemy tier: Common (1 second), Advanced (3 seconds), Elite (5 seconds), Boss (10 seconds). This prevents rapid re-staggering.
Can Laevatain and Yvonne perform Finishers?
Yes, but not while in their Ultimate state. Both operators cannot execute enemies during Ultimate. Plan your rotation to exit Ultimate before the stagger window for Finisher execution.
What gear set increases stagger efficiency?
The Swordmancer set provides +20% Stagger Efficiency Bonus, the only known source of this bonus. This increases stagger value accumulation by 20% when wearing the set. Formula: Accumulated Stagger = Base Stagger x (1 + 0.20).