Understanding the Hollows

Understand Zenless Zone Zero's Hollows. Learn navigation, combat, and resource management in these procedurally generated, dangerous dimensions.

The Hollows are the primary exploration and combat zones in Zenless Zone Zero, representing dangerous, ever-shifting dimensions teeming with Ethereal creatures, valuable resources, and unique challenges. Each expedition into a Hollow is procedurally generated, ensuring a fresh and unpredictable experience every time. Mastering navigation, combat, and resource management within these dynamic environments is crucial for progression and acquiring rare rewards.

Within a Hollow, you'll traverse various interconnected zones, engaging in intense combat encounters, solving environmental puzzles, and collecting precious Ether. Success hinges on a deep understanding of the different types of Hollows, their inherent environmental hazards, and how to strategically leverage the buffs and debuffs you'll encounter.

Types of Hollows and Their Characteristics

While the layouts are procedurally generated, Hollows often feature overarching themes or primary objectives that influence their design, enemy types, and available resources. Recognizing these themes allows for better team preparation and strategic planning.

• Ether Extraction Hollows: These Hollows prioritize the collection of raw Ether. They often feature more Ether Veins, fewer elite enemies, and puzzles centered around activating extraction devices. Expect environmental hazards that might disrupt extraction or attract smaller, swarming Ethereals.
  • Specific Examples:
    • Enemies: Primarily lower-tier Ethereals like Slime Ethereals, Scuttlers, and Prowlers. Elite encounters might include a single Armored Scuttler or a Disruptor Ethereal that attempts to disable extraction points.
    • Puzzles: Activating a series of Ether Conduits by aligning energy beams, or defending a Refinement Terminal from waves of enemies while it processes Ether.
    • Hazards: Etheric Overload Zones that deal damage over time if you stay too long, or Magnetic Flux Fields that periodically pull agents towards them, potentially into other hazards.
    • Rewards: High quantities of raw Ether, Ether Crystals (Small), and common character upgrade materials.
• Combat Gauntlet Hollows: Designed for intense combat, these Hollows are packed with a higher density of elite enemies, mini-bosses, and combat challenges. Environmental hazards might include traps that deal damage or restrict movement, forcing players into disadvantageous positions. Rewards typically include rare character materials and combat-focused gear.
  • Specific Examples:
    • Enemies: Frequent encounters with Elite Ethereals such as Annihilators, Berserkers, and Guardians. Mini-bosses like the Alpha Prowler or Corrupted Annihilator are common.
    • Puzzles: Often combat-centric, such as "Defeat all enemies within the time limit" or "Survive waves of enemies while protecting a fragile objective."
    • Hazards: Plasma Grids that activate in patterns, Explosive Barrels strategically placed near enemy spawn points, or Gravity Wells that restrict movement and pull agents into AoE attacks.
    • Rewards: Advanced Combat Data, Rare Character Ascension Materials, and high-tier Disk Drives.
• Puzzle-Focused Hollows: These Hollows emphasize environmental manipulation and puzzle-solving. Combat encounters might be less frequent but often serve as gatekeepers to puzzle solutions. Hazards could involve timed sequences, pressure plates, or elements that require specific character abilities to bypass. Rewards often include unique schematics or lore pieces.
  • Specific Examples:
    • Enemies: Fewer, but often strategically placed Ethereals that guard puzzle components or activate upon failure. Examples include Watcher Ethereals that trigger alarms or Enigma Ethereals that must be defeated in a specific order.
    • Puzzles: Logic Gate Sequences requiring specific button presses, Light Beam Refraction puzzles using movable mirrors, or Temporal Anomaly puzzles where you must manipulate time to bypass obstacles.
    • Hazards: Timed Pressure Plates that open doors for a brief period, Illusionary Walls that disappear when a specific condition is met, or Dimensional Rifts that teleport agents to different sections of the Hollow.
    • Rewards: Unique Schematics for crafting rare items, Lore Fragments, and Aether Cores.
• Resource Cache Hollows: Similar to Ether Extraction Hollows but focused on specific material types (e.g., upgrade components, crafting materials). These often have fewer combat encounters but might feature more intricate paths or hidden areas requiring keen observation to uncover all caches.
  • Specific Examples:
    • Enemies: Minimal combat, often just a few Scavenger Ethereals or Hoarder Slimes guarding caches.
    • Puzzles: Finding hidden switches, navigating mazes with invisible walls, or using specific agent abilities (e.g., a character with a "scan" ability) to reveal hidden paths or containers.
    • Hazards: Camouflaged Laser Grids, False Floors that drop you to a lower level, or Resource Traps that explode when a cache is opened without disarming.
    • Rewards: High quantities of specific Crafting Materials (e.g., Quantum Filaments, Bio-Circuit Boards), Disk Drive Components, and sometimes rare Proxy Data Logs.

Navigating Procedurally Generated Layouts

The unpredictable nature of Hollows requires adaptable strategies. Here are some general tips for successful navigation, along with a more detailed breakdown of how to approach their dynamic layouts:

• Prioritize Exploration: Especially in early runs, take your time to explore each room. You might uncover hidden paths, bonus Ether, or crucial buffs. Don't rush past unexplored corners; a hidden terminal or a valuable cache could be just around the bend.
• Map Awareness: Pay close attention to your mini-map. It will highlight unexplored areas, objective markers, and sometimes even the location of environmental hazards. The mini-map is your most reliable tool for understanding the current layout. Unexplored rooms appear as greyed-out squares, while visited rooms are illuminated. Objective rooms are marked with specific icons (e.g., a gear for a puzzle, a fist for combat).
• Pathfinding Logic: While random, Hollows often follow a logical progression. Look for glowing pathways, activated terminals, or destroyed barriers that indicate the correct direction.
  • Identifying Key Paths: Main progression paths are often indicated by brighter lighting, distinct floor patterns, or active energy conduits. Side paths leading to optional rooms or dead ends might be darker, narrower, or require a small environmental interaction to open.
  • Terminal Interactions: Many Hollows feature interactive terminals. Activating these can reveal new paths, disable hazards, or unlock doors. Always check for glowing interaction prompts (usually 'E' on PC, or a specific button on console/mobile).
  • Environmental Cues: Pay attention to the environment. A section of wall that looks slightly different, a loose floor panel, or a flickering light might indicate a hidden passage or a destructible barrier.
• Resource Management: Don't rush through combat. use cover, dodge mechanics, and elemental reactions to conserve HP and energy for tougher encounters.
  • Health Packs & Energy Orbs: These are often dropped by defeated enemies or found in destructible containers. Prioritize picking them up, especially if your team is low on health or energy.
  • Hollow Terminals: These rare terminals allow you to swap agents, heal your team, and sometimes even purchase temporary buffs. Use them strategically, especially before anticipated boss fights.
  • Ether Veins: Always collect Ether from these glowing nodes. They are a primary source of currency and can sometimes grant temporary buffs.
• Adapt Your Team: If you encounter a specific enemy type or hazard frequently, consider adjusting your team composition at the next available terminal.
  • Elemental Weaknesses: If you're facing many Fire-elemental Ethereals, switch in agents with Ice or Electric attacks.
  • Utility Agents: For Puzzle-Focused Hollows, bring agents with movement abilities (dashes, teleports) or environmental interaction skills. For Combat Gauntlets, prioritize high-damage dealers and strong defenders.
  • Healers/Support: If you're taking a lot of damage, consider including a dedicated healer or a character with strong shielding abilities.
• Backtracking and Dead Ends: Don't be afraid to backtrack if you hit a dead end. Sometimes, a path only opens after completing an objective in another room. Dead ends often contain small caches of Ether or minor resources, so they're not always a waste of time.
• The "Hollow Reset" Mechanic: In some deeper Hollows or specific challenges, there might be a "Hollow Reset" mechanic. This allows you to restart the current floor's layout if you're stuck or want to try for a better path, but it often comes with a penalty (e.g., loss of some accumulated Ether). Use it sparingly.

Common Environmental Hazards and Mitigation

Hollows are not just about enemies; the environment itself can be a formidable foe. Understanding and mitigating these hazards is key to survival.

Hazard Type	Description	Mitigation Strategy
Corrosive Pools	Areas of glowing, acidic liquid that deal continuous damage upon contact. Often found in industrial or decaying Hollows.	Avoid at all costs. use characters with movement skills (dashes, teleports like Nicole Demara's "Sublimation" or Billy Kid's "Quickdraw") to bypass. Some characters may have temporary immunity buffs during specific skills. Look for elevated platforms or intact pathways.
Energy Traps	Pressure plates or laser grids that trigger electrical discharges, stunning or damaging agents. Common in high-tech or security-focused Hollows.	Observe patterns. Some can be disabled by interacting with nearby terminals. Use ranged attacks to trigger from a distance, or characters with shields/damage reduction (e.g., Koleda's "Ironclad"). Agents with high Stun Resistance are also beneficial.
Falling Debris	Sections of the ceiling or walls that collapse, indicated by cracks, warning lights, or audible creaking. Prevalent in unstable or dilapidated Hollows.	Look for visual cues (shaking, dust falling) and audible warnings. Move quickly through affected areas. Some characters can briefly become invulnerable during certain skills (e.g., a perfect dodge or ultimate activation). Prioritize eliminating enemies in these zones quickly.
Cryo Vents	Vents emitting freezing gas, slowing movement and applying Cryo status, increasing damage taken. Typically found in colder or research facility-themed Hollows.	Dash through quickly. Characters with resistance to Cryo (e.g., Anton's "Heat Sync") or abilities to cleanse debuffs are useful. Some vents can be temporarily sealed by destroying a nearby power conduit or activating a switch.
Disorientation Fields	Areas that distort vision, invert controls, or scramble the mini-map. Often found in experimental or reality-bending Hollows.	Move cautiously. Rely on sound cues for enemy locations. Some characters may have passive resistance to status effects or skills that temporarily clear debuffs. Stick to walls or known paths to avoid getting lost.
Plasma Walls	Impassable energy barriers that deal high damage on contact. Can appear and disappear in patterns.	Observe their activation patterns. Time your movements precisely. Some can be temporarily deactivated by destroying a power generator or solving a nearby puzzle. Agents with high mobility are advantageous here.
Gravity Anomalies	Zones that either increase or decrease gravity, affecting jump height, movement speed, and sometimes even enemy attack patterns.	Adapt your movement. In high-gravity zones, rely on dashes and ground attacks. In low-gravity zones, use jumps to cover distance or avoid ground-based hazards. Some agents might have skills that temporarily negate these effects.

Buffs and Debuffs: Leveraging the Unpredictable

Throughout your Hollow expeditions, you'll encounter various temporary buffs and debuffs that can drastically alter the flow of combat and exploration. Recognizing and using these to your advantage is a hallmark of a skilled Proxy.

Common Buffs (Positive Effects):

• Ether Surge: Increases Ether gain from defeated enemies or collected nodes by a percentage (e.g., +50% Ether Gain) for a limited time (e.g., 60 seconds). Prioritize Ether collection and combat during this buff. Seek out Ether Veins.
• Elemental Resonance: Boosts the damage of a specific elemental type (e.g., "Fire Resonance" increases Fire damage by 30%) for all agents for a duration. Switch to agents matching the buff's element (e.g., Koleda or Ben for Fire Resonance) to maximize damage output.
• Defensive Matrix: Provides a temporary shield (e.g., 20% Max HP Shield) or significant damage reduction (e.g., -40% Damage Taken) for a short duration. Engage tougher enemies or push through hazardous zones. This is an ideal time to use high-risk, high-reward abilities.
• Swiftness Protocol: Increases movement speed (e.g., +30% Movement Speed) and dodge effectiveness (e.g., +20% Dodge Distance). Great for escaping danger, covering ground quickly, or repositioning during combat. Excellent for Puzzle-Focused Hollows.
• Critical Focus: Temporarily increases critical hit rate (e.g., +25% Crit Rate) and/or critical damage (e.g., +50% Crit Damage). Unleash your high-damage combos and ultimate abilities during this buff for massive burst damage. Agents like Billy Kid or Nekomata benefit greatly.
• Energy Regeneration Boost: Increases the rate at which your agents gain energy for their ultimate abilities. Focus on combat to charge ultimates faster and unleash them more frequently.
• Status Effect Immunity: Grants temporary immunity to all or specific negative status effects (e.g., Stun, Freeze, Burn). Push through areas with heavy environmental hazards or enemies that inflict debilitating status effects.

Common Debuffs (Negative Effects):

• Ether Drain: Slowly depletes your accumulated Ether (e.g., -5 Ether per 5 seconds) or reduces Ether gain (e.g., -30% Ether Gain) for a period. Focus on combat to quickly earn back Ether, or find a cleansing station/terminal to remove the debuff. Avoid unnecessary exploration during this.
• System Malfunction: Randomly disables one of your agent's skills or reduces their energy regeneration (e.g., -50% Energy Regen) for a duration. Adapt your combat strategy, relying on other agents or basic attacks. Prioritize removing this debuff if possible.
• Static Field: Reduces movement speed (e.g., -25% Movement Speed) and attack speed (e.g., -15% Attack Speed). Prioritize dodging and ranged attacks, or use agents with built-in speed buffs (e.g., Anby Demara's "Dash") to mitigate. Avoid melee combat if possible.
• Vulnerability Exposure: Increases damage taken from all sources (e.g., +30% Damage Taken). Play defensively, use shields (e.g., Koleda's "Ironclad"), and focus on burst damage to quickly eliminate threats before they can retaliate. Prioritize healing.
• Elemental Weakness: Makes your agents more susceptible to a specific elemental damage type (e.g., "Fire Weakness" means +50% Fire Damage Taken). Avoid enemies of that element or bring agents with strong elemental resistances or shields. Focus down the elemental threats quickly.
• Skill Cooldown Increase: Increases the cooldown duration of all or specific agent skills. Rely more on basic attacks, dodge mechanics, and ultimate abilities if unaffected. Adjust your combat rotation.
• Blinded: Significantly reduces visibility, making it harder to see enemies or environmental hazards. Rely on sound cues, mini-map, and memorized layouts. Use wide-area attacks or abilities that highlight enemies.

Always prepare your team composition based on the Hollow's known threats and elemental weaknesses. use the various buffs and debuffs you encounter within the Hollows to your advantage, turning potential setbacks into strategic opportunities. A well-prepared Proxy understands that every challenge in the Hollow is also an opportunity for mastery.