ZZZ "Assemble! Mock Exam Comeback Plan" Event Guide — Rewards, Boisterous Echoes W-Engine & Completion Tips

Introduction

Version 3.0 of Zenless Zone Zero — "A Sleepwalker's Confession" — has already brought us a brand-new Wind element, the sky city of Roscaelifer, and a free S-Rank Agent (Pyrois). But the update's flagship limited-time event launches on June 26: the Assemble! Mock Exam Comeback Plan.

This event is a shooting mini-game set at Aurelia Academy, where Proxies help Mr. Goomy turn around a course with a zero percent pass rate. Beyond the fun bullet-heaven gameplay, it offers 1,200 Polychromes, a free A-Rank W-Engine, and a suite of upgrade materials. And if you're pulling for Velina (the new Wind Anomaly S-Rank), the event-exclusive Boisterous Echoes W-Engine is arguably her best F2P option.

Let's break down everything you need to know — event schedule, gameplay mechanics, full reward table, and whether the W-Engine is worth your time.

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Event Schedule & Requirements

Detail	Info
Start	June 26, 2026 — 10:00 (server time)
End	July 27, 2026 — 03:59 (server time)
Duration	31 days (full Version 3.0 cycle)
Requirement	Inter-Knot Level 20, Main Story Chapter 1 Intermission cleared
Type	Limited-time flagship event

The event runs for the entire second half of Version 3.0 and beyond — it actually extends a few days past the Phase 2 banner end (July 28). That gives you plenty of time to complete everything, even if you're starting the patch late.

Pro tip: If you haven't cleared Chapter 1 Intermission yet, you've got two days. The requirement is low enough that any active player should meet it easily.

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Gameplay: How the Mock Exam Works

The Assemble! Mock Exam Comeback Plan is a shooting mini-game — think Vampire Survivors meets ZZZ's combat. You control a single Agent through bullet-hell style stages, automatically attacking while you dodge and collect power-ups.

Core Loop

1. Choose Your Agent

Each stage lets you pick one Agent from your roster. Every Agent has unique projectile skills that define your run's playstyle. Velina, for example, brings Wind-element projectiles that synergize with her Vortex mechanic. You're not locked into a specific character — experiment with different Agents to see whose shot pattern you prefer.

2. Collect & Upgrade Projectile Skills

As you defeat enemies along the pathway, they drop projectile skills that you can pick up. These aren't just passive buffs — you can craft and upgrade them mid-run to create the perfect loadout. Think of it like building a skill deck in real time:

• Common skills — Basic shot patterns, small AoE
• Rare skills — Piercing rounds, elemental effects, multi-projectile spreads
• Boss skills — Powerful abilities dropped by stage bosses

You can stack multiple skills and upgrade existing ones to increase their potency. A well-crafted loadout is the difference between a comfortable clear and getting overwhelmed.

3. Eliminate Enemies & Collect Loot

Stages are linear pathways filled with enemies. Your goal: shoot everything, dodge everything, and collect the loot. Some stages feature boss enemies that must be defeated to advance. Bosses drop better rewards and higher-tier skill upgrades.

4. Complete Stages for Rewards

Progress through the event by clearing stages and completing specific challenge objectives. Each milestone unlocks more rewards — including the signature Boisterous Echoes W-Engine and its overclock materials.

Strategy Tips

• Prioritize projectile width early. The bullet-heaven format means you'll face crowds. Wide shot patterns give you breathing room to focus on dodging.
• Elemental synergy matters. If you're running Velina, prioritize projectile skills that apply other Attribute Anomalies — triggering Vortex (Windswept + another Anomaly) creates massive AoE explosions that clear screens.
• Don't hoard upgrade materials. Spend them as you go. The scaling ramps up noticeably between stages, and an upgraded common skill outperforms a raw rare one.
• Check daily objectives. Like most ZZZ flagship events, expect daily or cumulative missions that accelerate your reward track.

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All Rewards: What You Can Earn

Boisterous Echoes (A-Rank Anomaly W-Engine) — FREE

This is the headline reward, and it's excellent. Here are the stats at Level 60:

Stat	Value
Base ATK	594
Anomaly Proficiency	75
Rarity	A-Rank
Specialty	Anomaly

W-Engine Effect — Resounding Drum:

When the equipper triggers the Vortex effect, they gain 2 Energy. This effect can trigger once every 10s.

When attacking enemies afflicted with an Attribute Anomaly, the equipper deals 11.5% increased DMG.

At higher overclock refinements, the Anomaly DMG bonus scales up significantly — making this W-Engine competitive even against gacha A-Rank options.

Who is it good for?

• Velina — This is her best F2P W-Engine, bar none. The Anomaly Proficiency stat and the Vortex energy refund directly support her kit. Both Icy Veins and Mobalytics list Boisterous Echoes as Velina's top free-to-play option.
• Piper — The classic Physical Anomaly queen also benefits from the AP substat and the Anomaly DMG bonus. If you're running Piper in a disorder team, this W-Engine performs comparably to Rainforest Gourmet.
• General Anomaly Agents — Any anomaly character that triggers disorders will get value. Grace, Burnice (if you have her), or future Anomaly units all appreciate the stats.

Full Reward Table

Reward	Estimated Amount
Polychrome	1,200 (~7.5 pulls)
Boisterous Echoes (A-Rank Anomaly W-Engine)	1 copy + overclock materials
Hamster Cage Pass	Skill level-up material
Original Chip	W-Engine upgrade material
Bangboo System Widget	Bangboo skill material
Senior Investigator Log	Agent EXP material
Denny	Standard currency

The 1,200 Polychromes alone make this event worth completing — that's nearly half a pity on the limited banner, or about 8% of the total F2P Polychromes available in Version 3.0 (20,760 total).

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Why This Event Matters for Your Version 3.0 Pull Plan

Version 3.0 offers 145 free limited pulls for F2P players, and the Assemble! Mock Exam Comeback Plan contributes 1,200 of those Polychromes — roughly 7.5 pulls. That might not sound like a lot next to the 20,760 total, but here's why the timing matters:

Phase 1 (Velina) is front-loaded. The event drops on June 26, which is nine days into Phase 1. If you're pulling for Velina (and honestly, as the first Wind Anomaly agent who opens the Vortex archetype, you should strongly consider it), these 1,200 Polychromes plus the 10 free Encrypted Master Tapes from the All-New Program login event give you a solid cushion for hitting pity.

Phase 2 (Norma) overlaps heavily. The event runs until July 27, which covers almost all of Phase 2 (July 8–28). If you're skipping Velina for Norma, you can complete the event at your leisure during Phase 2 and use the rewards toward Norma's banner.

The W-Engine saves you pulls. Boisterous Echoes is a genuinely good A-Rank Anomaly W-Engine. If you'd otherwise be pulling on the W-Engine banner for an A-Rank option, this event saves you 70+ pulls of gacha currency. That's significant.

Budgeting Your Version 3.0 Pulls

Goal	Pulls Needed	F2P Feasibility
Velina (guaranteed, lose 50/50)	180	Tight — 145 available, may need saved pulls
Velina (win 50/50)	90	✅ Very comfortable
Norma (guaranteed)	180	❌ Not enough from patch alone
Norma (win 50/50)	90	✅ Feasible with existing savings
Velina + Velina W-Engine	180 + ~65	❌ Not F2P without deep savings
Pyrois (free, fully unlocked via Interboo)	0	✅ Included

Source: LootBar ZZZ 3.0 Pull Count (lootbar.com/blog/en/zenless-zone-zero-version-3-0-pull-count.html)

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Boisterous Echoes vs. Other Anomaly W-Engines

To help you decide whether to invest overclock materials into Boisterous Echoes, here's how it stacks up against common A-Rank alternatives:

W-Engine	Base ATK (Lv60)	AP	Effect	Availability
Boisterous Echoes	594	75	Vortex energy + 11.5% Anomaly DMG	Event (Free)
Rainforest Gourmet	594	75	Energy on EX Special + DMG boost	Gacha / Standard
Electro-Lip Gloss	594	75	Energy on Assist + Team DMG boost	Battle Pass (paid)
Weeping Cradle	594	90	DMG vs enemies below 50% HP	Gacha / Standard
Slice of Time	594	75	Energy over time + ATK boost	Gacha / Standard

Boisterous Echoes sits comfortably in the middle of the pack. Rainforest Gourmet edges it out on raw damage consistency, but Boisterous Echoes has two specific advantages:

1. It's free and fully refinable — no gacha luck required
2. The Vortex energy refund is unique — no other A-Rank W-Engine offers conditional energy on Vortex, which matters for Velina's rotation

For Velina specifically, Mobalytics ranks Boisterous Echoes as her best F2P W-Engine and only behind her signature Joyau Dore and Weeping Cradle overall.

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Other Version 3.0 Events to Watch

The Assemble! Mock Exam Comeback Plan isn't the only event in Version 3.0. Here's the full slate:

Event	Type	Est. Polychromes
Assemble! Mock Exam Comeback Plan	Flagship (shooting mini-game)	1,200
Bangbang! The Genius and the Miracle Chip	New permanent mode + event	1,000+
Gleaming Shadow Team Battle	Combat challenge	360
Art Is Bangboo!	Creative / collection	420
Celestial Nexus Intelligence Dossier	Tactical / strategy	~300
Tales of the Hobbling Crow	Story event	~300
Data Bounty - Combat Simulation	Endgame challenge	~200

Total event Polychromes: ~3,780 from limited-time events alone, plus the permanent Annihilation Simulacrum and Bangbang mode rewards.

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FAQ

When exactly does the event start?

June 26, 2026 at 10:00 server time. Server time is based on your region (Asia/America/Europe).

Can I complete the event as a new player?

The requirement is Inter-Knot Level 20 and Chapter 1 Intermission cleared — that's roughly 5–8 hours of gameplay for a fresh account. You have until July 27, so yes, even new players can complete it.

Is Boisterous Echoes worth overclocking?

Absolutely. It's Velina's best F2P option and a solid generalist Anomaly W-Engine. The overclock materials are included in the event rewards, so you're not spending extra resources.

How long does it take to clear the event?

Most players will finish in 2–4 hours spread across the event period. Stage-based progression means you can do a few stages per day.

Does the event have daily missions?

Most ZZZ flagship events include daily missions that accelerate progress. Expect daily objectives that reward event currency or progress tokens.

Is the W-Engine good for anyone besides Velina?

Yes. Piper, Grace, and any future Anomaly agents benefit from the Anomaly Proficiency substat and the conditional DMG bonus. It's a strong generalist option.

What about the Bangboo System Widget reward?

Bangboo System Widgets are used to upgrade Bangboo skills. They're relatively rare outside events, so grab them while you can — especially if you're building Ultra Jake (the new S-Rank Bangboo).

Can I miss the event?

Yes — it's limited-time. The event ends July 27 at 03:59 server time. After that, the Boisterous Echoes W-Engine becomes unavailable (at least until a future rerun or addition to the standard pool, which is never guaranteed).

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Conclusion

The Assemble! Mock Exam Comeback Plan is a solid flagship event that delivers meaningful value without demanding excessive time. The 1,200 Polychromes are always welcome, but the Boisterous Echoes W-Engine is the real prize — a genuinely good A-Rank Anomaly weapon that serves as Velina's best F2P option and a strong generalist for any Anomaly team.

Whether you're deep into Version 3.0's story or just jumping in for the free rewards, this event is worth your time. Mark your calendar for June 26, make sure you've cleared Chapter 1 Intermission, and get ready to help Mr. Goomy turn around Aurelia Academy's exam crisis.

Planning your pulls for the rest of Version 3.0? Use our ZZZ Gacha Calculator to see exactly how many pulls you can afford before the banners end.