Zenless Zone Zero Codexery

Eidolon Nest

A fortress of science built to cage the monsters that birthed the Hollows.

The Eidolon Nest is a specialized, high-security containment facility located deep within the Hollows of New Eridu, serving as the primary repository for captured or dormant Elders and other massive Etherium anomalies. Unlike standard Hollows which are chaotic and unstable, this location functions as a controlled environment where Proxy agencies and the S.R.A. can safely study, monitor, and occasionally weaponize these colossal threats without risking the safety of the city's surface population.

Type
Containment Facility / Research Site
Location
Deep Hollows (New Eridu)
Primary Threat Level
Extreme (Eidolon Class)
Affiliated Factions
S.R.A., Proxy Agencies
Status
Active / Restricted Access
Key Feature
Stabilized Etherium Containment Fields

Lore & Background

Access to the Nest is strictly regulated, reserved for elite Proxy teams and S.R.A. researchers who understand the sheer lethality of their subjects. The facility is not merely a prison but a laboratory; scientists study the unique properties of the Eidolons' Etherium cores in hopes of developing new energy sources or defensive technologies. However, the psychological toll on those stationed within is immense, as they live in constant proximity to entities that could end civilization with a single movement if containment were ever breached.

In Their Own Story

The hum of the containment field was the only sound that mattered here, a low-frequency vibration that rattled the teeth and settled deep in the marrow. Agent Kael adjusted his helmet seal, staring through the reinforced glass at the slumbering giant beyond. It looked like a mountain made of liquid crystal, shifting slowly even in its stasis, its surface rippling with colors that didn't exist on any visible spectrum. 'Readings are stable,' he muttered into his comms, though his hand hovered near his weapon instinctively. He knew the history of this place: every time an Eidolon woke up, it wasn't just a monster attack; it was a war for survival. Today, the mountain slept, but Kael knew that in the Hollows, even sleep is just a pause before the nightmare begins.

Reader's Guide

The Eidolon Nest feels less like a dungeon and more like a high-tech industrial complex fused with alien biology. The atmosphere is sterile yet oppressive, dominated by the constant whirring of massive cooling fans and the blinding glow of containment energy fields. Etherium corruption levels here are paradoxically low in the corridors but spike dangerously near the holding cells. Players will navigate through clean, white-tiled research sectors that abruptly transition into rusted, organic-looking chambers where the walls seem to pulse with a faint, sickly light. Key landmarks include the Central Observation Deck, offering a panoramic view of the primary containment vaults, and the Stasis Corridors, narrow pathways lined with emergency blast doors. Players must be wary of localized Etherium surges that can disrupt electronics or spawn minor Hollow monsters if they linger too long near unstable cells.

Did You Know?

More in New Eridu & Hollows

Elsewhere in the Zenless Zone Zero universe

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