What is Lost Void?
Lost Void is a new roguelike mode introduced in Zenless Zone Zero v2.8, designed as the definitive replacement for the secondary Hollow Zero content (replacing the old Blitz and Deep exploration modes). Unlike the main Hollow Zero which follows a more structured progression, Lost Void introduces randomized room layouts, a powerful Gear Resonance system, and a Medal system that fundamentally changes how you approach each run.
Think of Lost Void as ZZZ's answer to games like Hades or Slay the Spire — each run is a fresh start where you make choices about which rooms to enter, which Gear Resonance abilities to stack, and which enemies to fight. Your rewards scale with difficulty, and the mode is designed to be played weekly for maximum income.
Key Differences from Classic Hollow Zero:
- No preset map: Rooms are randomized. You choose your path at each branching point.
- Gear Resonance: Collect and equip up to 6 Gear Resonance chips that provide transformative buffs and synergies.
- Medal system: Equip 5 medals before the run that provide persistent bonuses — these are your "build foundation."
- Difficulty tiers: 4 difficulty levels (Normal, Hard, Extreme, Nightmare) with escalating rewards and enemy scaling.
- Shorter runs: A full Lost Void run takes 20-35 minutes versus 45-60 minutes for old Hollow Zero deep dives.
💡 Prerequisite: Lost Void unlocks at Inter-Knot Level 40. You must complete the Hollow Zero introduction quest "The Hollow Zero: Lost Void" before accessing the mode for the first time. The tutorial run is fixed (Normal difficulty) and teaches you the Medal and Gear Resonance basics.
The Medal System — 5 Slots for Your Build Foundation
The Medal system is Lost Void's central progression mechanic. Before each run, you equip 5 Medals across 5 distinct slots. Each Medal provides a specific buff that lasts the entire run — choose wisely because once the run starts, you cannot change them until you finish or abandon.
| Medal Slot | Stat Focus | Example Medals | Priority |
|---|---|---|---|
| Slot 1: Offense | ATK%, Elemental DMG, CRIT Rate | Scorched Emblem (+12% Fire DMG), Bladed Crest (+8% CRIT Rate) | 🔥 High — main DPS stat stick |
| Slot 2: Defense | HP%, DEF%, Shield Strength | Iron Bulwark (+15% Max HP), Aegis Fragment (+10% Shield Efficiency) | 🟡 Medium — pick based on comp |
| Slot 3: Anomaly | AP, AM, Anomaly Buildup Rate | Corrosion Badge (+30 AP), Swirl Mark (+15% Anomaly Buildup Rate) | 🔥 High for Anomaly teams; Low otherwise |
| Slot 4: Utility | Energy Regen, Skill DMG, Dash/ Dodge | Flow Sigil (+15% Energy Regen), Phantom Seal (+20% Dodge Invulnerability Frames) | 🟡 Medium — quality of life |
| Slot 5: Resonance | Gear Resonance amplification | Synergy Core (+25% Gear Resonance effect), Amplifier Chip (+1 Gear Resonance slot) | ⭐ Critical — defines your build |
📊 Medal Rarity Tiers: Medals drop in 3 rarities — Standard (blue, +100% base effect), Refined (purple, +150% base effect), and Ascended (gold, +200% base effect). Ascended Medals are rare drops from Nightmare difficulty boss rooms. Your goal is to eventually fill all 5 slots with Ascended Medals. A full set of Ascended Medals roughly doubles the power of an optimal run compared to a full standard set.
Gear Resonance — Transitive Synergies
Gear Resonance is the gameplay loop within each Lost Void run. As you clear combat rooms and boss nodes, you earn Resonance Chips — up to 6 chips per run. Each chip provides a significant buff, but the real power comes from Resonance Synergies between chips.
When two or more chips share a Resonance tag (e.g., "Frost," "Flame," "Tempest"), they activate a Synergy effect that is more than the sum of its parts. For example:
- Flame (2 chips): All Fire DMG +25%. Burn duration +4 seconds.
- Flame (3 chips): Additionally, every Burn tick restores 2% of max HP to the active character.
- Flame (4 chips): Additionally, hitting a Burning enemy with any attack explodes for bonus Fire DMG equal to 15% of ATK.
| Resonance Archetype | Chip 2x Bonus | Chip 3x Bonus | Chip 4x Bonus | Best For |
|---|---|---|---|---|
| Flame | +25% Fire DMG, +4s Burn duration | Burn ticks heal 2% HP | Burn explosion (15% ATK AoE) | Burnice, Soldier 11, Lucy |
| Frost | +25% Ice DMG, +20% Freeze duration | Frozen enemies take 15% more DMG | Freeze shatter AoE (40% ATK) | Miyabi, Ellen, Lycaon |
| Tempest | +20% Electric DMG, +3s Shock duration | Shock ticks have 30% chance to stun | Lightning strike on Shock proc (30% ATK) | Yanagi, Grace, Rina |
| Fury | +15% ATK, +8% CRIT Rate | +25% CRIT DMG on stunned enemies | Chain Attack reset on kill | Stun + Burst teams (Mono-Burst) |
| Void | +20% Anomaly Buildup Rate, +15 AP | Disorder damage +30% | Disorder heals team 5% HP | Disorder teams |
💡 Build Strategy: Do NOT try to activate 3 different Resonance types. The power curve heavily rewards committed builds. Aim for one primary Resonance (3-4 chips) and use the remaining 2-3 slots for flexible chips (ATK%, Energy Regen, healing). A 4-chip Flame build outperforms a mixed 2 Flame + 2 Frost + 2 Tempest build by approximately 40% in total effective damage output.
Best Teams for Each Lost Void Difficulty
Lost Void has 4 difficulty tiers, and your team choices should adapt to both the difficulty level and the Resonance build you plan to pursue. Here are the recommended teams for each tier:
| Difficulty | Recommended Team | Resonance Build | Strategy Notes |
|---|---|---|---|
| Normal (Lv 40-45) | Any leveled team (no specific requirements) | Any 2x Resonance + utility chips | Use this tier to learn the mechanic. Build toward your preferred Resonance archetype. No penalty for failure. |
| Hard (Lv 50-55) | Grace + Anton + Qingyi or any functional F2P team at level 50+ | Tempest (Electric) or Fury (Crit) | Enemies have 25% more HP. Prioritize yellow (Resonance) rooms over blue (healing) rooms. Bring at least one sustain tool. |
| Extreme (Lv 60-65) | Burnice + Jane + Caesar / Yanagi + Rina + Caesar | Void (Disorder) or Flame (Fire) | Enemies have 50% more HP and +20% ATK. Must have full Ascended Medal set. Prioritize boss rooms for gold Medals. Bring Safety or Avocaboo Bangboo. |
| Nightmare (Lv 70-75) | Miyabi + Lycaon + Soukaku / Burnice + Jane + Caesar (optimally built) | Frost (Ice) or Void (Disorder) 4-chip | Enemies have 100% more HP, +35% ATK, and new attack patterns. Failure is common even for veterans. Must have 6 Resonance chips with 4+ matching archetype. Safety Bangboo or Avocaboo mandatory. Consider cauda-geometric pathing (prioritize Gold Resonance rooms). |
📊 Nightmare Mode Warning: Nightmare difficulty is tuned for fully built endgame teams. You need at least 2,000+ ATK on your main DPS, 60%+ CRIT Rate / 120%+ CRIT DMG (for crit teams) or 400+ AP (for Anomaly teams), and max-level characters. If your Shiyu Defense Critical Node clear times are above 3 minutes, Nightmare will likely wipe you. Grind Extreme first until you can clear it effortlessly.
Recommended Gear Resonance Builds Per Team Archetype
Here are specific Resonance chip loadouts for the most common team archetypes in Lost Void:
| Team Archetype | Recommended Resonance Build | Chip Priority | Flexible Chips |
|---|---|---|---|
| Disorder (Burnice + Jane) | 4x Void + 2x Flame | Void Core → Anomaly Amplifier → Flame Ignition → Flame Seed → Energy Matrix → DEF Breaker | Sub out DEF Breaker for HP Leech if survival is an issue |
| Mono-Ice (Miyabi + Lycaon) | 4x Frost + 2x Fury | Frost Crystal → Permafrost Core → Fury Catalyst → Frost Edge → CRIT Matrix → Energy Matrix | Sub Energy Matrix for Stun Amplifier if lacking stun uptime |
| Electric Burst (Yanagi + Rina) | 4x Tempest + 2x Fury | Tempest Conductor → Shock Amplifier → Fury Trigger → Tempest Coil → Energy Matrix → AP Booster | Swap AP Booster for DEF Breaker against high-DEF enemies |
| Mono-Fire (Soldier 11 + Burnice) | 4x Flame + 2x Fury | Flame Core → Burning Will → Fury Catalyst → Flame Ring → ATK Amplifier → CRIT Matrix | ATK Amplifier can be swapped for HP Leech on sustain-deficient teams |
| Budget F2P (Grace + Anton) | 3x Tempest + 3x Fury | Tempest Conductor → Fury Catalyst → Tempest Coil → ATK Amplifier → Energy Matrix → CRIT Matrix | Focus on mixed stats for hybrid damage profile |
💡 Pro Tip: The Energy Matrix chip (Utility archetype, no Resonance) is universally valuable. It provides +20% Energy Regen and a one-time full energy restore per combat room. Every team benefits from this — it enables an extra EX Special per rotation, which translates to roughly 15% more DPS. Take it in every run unless you have a specific reason not to.
Weekly Rewards and Rotation
Lost Void follows a weekly rotation cycle that resets every Monday. Here is what you can earn each week and how the rotation affects your strategy:
| Reward Type | Amount (Weekly) | Source | Notes |
|---|---|---|---|
| Polychrome | 240 (3 runs × 80 each) | Weekly bounty: complete 3 Lost Void runs at Hard+ | This is the main Polychrome income from Lost Void. Ranks second after Shiyu Defense for weekly endgame currency. |
| Boopons | 15–25 | First clear of each difficulty tier per week | Scales with difficulty. Nightmare first-clear bonus is 10 Boopons. Hard/Extreme give 5 each. |
| Resonance Chip EXP | ~200 | Every combat room clear | Used to upgrade permanent Resonance Chip levels in the hub. Caps at level 10. |
| Medal Fragments | Variable | Boss room clears, weekly reset chest | 10 fragments = 1 random Ascended Medal. Focus on boss rooms for double fragment drops. |
| Investigation Tokens | ~300 | All room clears, bonus chests | Hollow Zero general currency. Used for seasonal shop items and permanent upgrades. |
Weekly Rotation Notes: Every 2 weeks, the Resonance availability changes. One Resonance archetype gets +50% drop rate, and one gets -30% drop rate. Check the in-game "Auspicious Resonances" notice before starting your weekly runs to plan around boosted chips. For example, during a Flame-boosted week, you will hit 4-chip Flame far more consistently, making Burnice teams significantly stronger.
Minimum Weekly Commitment: To maximize your Polychrome income, you need to complete 3 runs at Hard difficulty or above. Each run takes 20-35 minutes. Budget about 1-2 hours per week for Lost Void to claim all weekly rewards. If you can clear Extreme consistently, the additional rewards (more Medal Fragments, higher Boopons) are worth the extra time investment.
Tips for Clearing High-Difficulty Nodes
- Prioritize Resonance rooms over everything else. In Extreme and Nightmare, a 4-chip Resonance build is essentially mandatory. Always choose the yellow (Resonance) room icon when given a choice, especially in the first half of the run. You need to lock in your archetype before the mid-boss.
- Know when to take healing rooms. Blue (healing) rooms restore 50% HP for the whole team and remove up to 2 corruption debuffs. Take one healing room per run on Extreme+, two if your team has no inherent sustain (no Caesar, no Avocaboo). Taking them too early wastes their restoration potential — aim for one before the mid-boss and one before the final boss.
- Magnetboo is S-tier in Lost Void. Many combat rooms feature waves of 6+ enemies. Magnetboo's grouping active skill turns a 60-second wave clear into a 15-second one. The run-wide time saved directly translates to fewer health losses and more consistent clears. Even in single-boss rooms, the suction effect can interrupt boss attack patterns.
- Stack DEF shred if your team can. Nightmare enemies have inflated DEF values. The DEF Breaker chip (15% DEF shred) and team-internal DEF shred (Caesar's W-Engine, Rocketboo) become multiplicative force multipliers. A 30% total DEF shred from chips + Bangboo ≈ 20% more team damage against Nightmare bosses.
- Do NOT force a Resonance you cannot complete. If you reach room 8 (midpoint) with only 1 Flame chip and no clear path to more, pivot to a hybrid build. It's better to have a 2x Void + 2x Fury mix than to waste rooms chasing a 4th Flame chip that never drops. The flexible player clears Nightmare; the rigid player wipes at the final boss.
- Save Bangboo active for boss phases. In boss rooms, many bosses have invulnerability phases where they reposition or summon adds. Use your Bangboo skill to clear adds during these phases rather than wasting it on the boss's invulnerable frame. The Bangboo's 15-20 second cooldown lines up nearly perfectly with boss phase transitions.