Arknights: Endfield 'Echoes of War – Season of Phantasia' Guide: Schedule, Stages Rewards and Best Teams

Arknights: Endfield’s Echoes of War: Season of Phantasia introduces a new rotation of endgame challenges, featuring new enemy mechanics, special stage conditions, and additional opportunities to earn valuable rewards.

Before investing resources into new Operators and upgrades, players can check our👉: Arknights: Endfield 1.6: Release Date, New Operators, Redeem Codes & More for the latest Version 1.6 updates, upcoming characters, and available resources.

Understanding stage traits, preparing multiple teams, and optimizing Operator builds are the keys to achieving higher ratings. Players who need additional resources for Operator upgrades can also check TOPUPlive for Endfield top-up options.

▍What Is Echoes of War in Arknights: Endfield?

Echoes of War is a permanent seasonal combat mode in Arknights: Endfield. Each season contains multiple limited-time cycles, and every cycle features three rotating challenge stages selected from the available stage pool.

Echoes of War has three difficulty levels. Each difficulty provides a different Star rating. Completing a stage in Normal, Hard, and Brutal rewards 1★, 2★, and 3★, respectively. Completing a stage on Brutal difficulty while fulfilling the Bonus Challenge requirement grants the Lustrous boost.

A complete cycle contains three stages, meaning players can obtain:

▍Arknights: Endfield - Echoes of War: Season of Phantasia Overview

Season of Phantasia Cycle Schedule

Official version preview confirms the following three cycles (server time):

Asia Server uses UTC+8. Americas / Europe Server uses UTC-5. Season of Fervor follows immediately after.

New Stage Traits Overview

Blightshade File: Thunderclap

• New stage with unique Blightshade enemy mechanics (details available in-game after launch).

Beast File: Qingbo Stockade

• After defeating the Cloud Stalker, increase the stacks of Arts Infliction and Vulnerability applied.
• After defeating the Quillbeast, increase the Status Level of Arts Reactions, Crush, and Breach applied.
• After defeating Heavy Sting α, immediately recover some SP when consuming Arts Infliction or Vulnerability stacks.
• Defeating any set of enemies grants more HP to the remaining enemies.

Glaiver File: Yinglung

• After the battle begins, operators’ starting SP and Max SP are increased.
• All SP recovery and regeneration are reduced.

For a better understanding of which Operators are currently performing well in endgame content, check our👉: Arknights: Endfield Tier List – Best Operators Ranked for the Current Meta to compare the strongest DPS, Support, and Utility Operators before investing resources.

▍Best Teams for Arknights: Endfield - Echoes of War: Season of Phantasia

Cycle of Phantasia I (After Sanctuary of Ink update – Oct 22, 2026)

· Blightshade File: Thunderclap (New)

Boss has 7.667 million HP, 35 Electric Resistance and 20 Physical Resistance, with a strict 3-minute time limit. There is no stage specialization.

This is a pure single-target DPS check with very high effective HP. Ice and Nature teams perform well due to their strong single-target output. Electric teams struggle significantly here because the effective HP becomes close to 1.5 times a standard high-HP boss.

Best Teams:

Focus on maximizing consistent single-target damage and avoid teams that rely heavily on Electric damage.

· Beast File: Qingbo Stockade (New)

Stage specialization: Defeating specific enemies grants permanent buffs for the rest of the stage. You can only attack one enemy group at a time. After defeating an enemy, the remaining enemies gain +50% HP.

Enemy HP: Spiked Beast 1.596M, Heavy-Spined Angel 1.594M, Cloud Raider 1.337M.

Buffs available:

• Defeat certain enemies → Arts Abnormality / Smash / Shatter Armor effect level +1
• Consume Attachment / Break Defense → Recovery Skill Power +25
• Arts Attachment / Break Defense → effect level +1

Recommended clear order depends on your team element:

• Electric teams usually prioritize Spiked Beast → Heavy-Spined Angel → Cloud Raider while taking Arts Abnormality first.
• Ice / Fire / Physical teams often reverse the order and prioritize different buffs.
• Nature / Hybrid teams favor Recovery Skill Power early.

Best Teams:

Plan the kill order carefully so the HP inflation on remaining enemies stays manageable and you collect the most useful buffs for your damage type.

· Grievously Besieged

Three elite enemies appear in three separate waves (total HP 4.32M). The center of the field has a blue vulnerability zone. Enemies standing inside it gain +10% damage taken per second, stacking up to +150%.

The zone starts dark blue and turns bright blue-purple when an enemy enters. This is a pure single-target stage with very comfortable pacing.

Best Teams:

Keep enemies inside the vulnerability zone as much as possible to stack the damage amplification quickly. Note that the first enemy has extremely high Fire Resistance (50%), so Fire teams are not recommended.

Cycle of Phantasia II (Oct 22, 2026 – Oct 29, 2026)

Cycle of Phantasia II have not been released yet. Stay tuned for future updates.

Cycle of Phantasia III (Oct 29, 2026 – Nov 5, 2026)

Cycle of Phantasia III have not been released yet. Stay tuned for future updates.

▍FAQs about Arknights: Endfield - Echoes of War: Season of Phantasia

1. When does Season of Phantasia start?

It begins with the Sanctuary of Ink (Version 1.6) update on October 15, 2026.

2. What is Echoes of War in Arknights: Endfield?

Echoes of War is a permanent seasonal endgame mode where players challenge rotating stages with unique mechanics and earn Stars, Season Ratings, and rewards.

3. How many stages are available in each Echoes of War cycle?

Each cycle contains three rotating stages. Players can earn up to 9★ by clearing all three stages on Brutal difficulty.

4. What is the highest rating in Echoes of War?

The highest normal rating is 9★ per cycle. Players can also obtain the Lustrous boost by completing Brutal difficulty bonus challenges.

▍Conclusion

Arknights: Endfield Echoes of War Season of Phantasia offers one of the biggest challenges for endgame players, rewarding those who understand stage mechanics, optimize Operator builds, and prepare multiple teams.

To better plan your pulls and save resources for future banners, don’t miss our 👉 Arknights: Endfield Version 1.6 Pull Count: How Many Oroberyl Can You Get? which breaks down the estimated Oroberyl income and Headhunting resources available during the update.

Follow TOPUPlive for more Arknights: Endfield guides, tier lists, and update news, and check our platform when you need additional resources to strengthen your Operators.