What Are Stormvaults? — Sigmar's Hidden Vaults

Stormvaults are ancient vaults created by Sigmar during the Age of Myth to contain dangerous artifacts, monsters, and forbidden knowledge. Many were lost during the Age of Chaos and are now being rediscovered — often with catastrophic results. They’re the Mortal Realms’ equivalent of Pandora’s Box: sealed containers of power that were hidden for good reasons, now being opened by treasure seekers, warlords, and curious scholars who don’t understand what they’re unleashing.

Stormvaults are one of the most compelling narrative elements in Age of Sigmar. They explain why ancient dangers keep emerging in the present, provide adventure-hook locations for campaigns and narrative play, and add depth to Sigmar’s character — showing that even the God-King made decisions he later couldn’t control.

Why Did Sigmar Create the Stormvaults?

During the Age of Myth, Sigmar ruled over a golden era of civilisation across the Mortal Realms. The Pantheon of Order was united, cities flourished, and the forces of Chaos were held at bay. But the realms were ancient places, filled with dangers from before Sigmar’s time — entities, weapons, and knowledge that were too dangerous to use and too powerful to destroy.

What Went Into the Stormvaults?

Sigmar created the Stormvaults to contain anything that couldn’t be safely kept in mortal hands:

Weapons of catastrophic power — Blades that could kill gods, artifacts that warped reality, and siege weapons capable of destroying Realmgates. These were remnants of the World-That-Was or creations of the Age of Myth that proved too dangerous.
Imprisoned entities — Daemon Princes, rogue elementals, fragments of Chaos Gods’ power, and other beings that couldn’t be killed but needed to be contained.
Forbidden knowledge — Tomes of forbidden magic, prophecies too dangerous to read, and records of events that could drive mortals to madness.
Failed experiments — Before the Stormcast Eternals, Sigmar experimented with other methods of creating super-soldiers and divine weapons. Some results were… problematic. These failures were sealed away rather than destroyed.
Contested treasures — Artifacts that multiple gods or factions claimed ownership of were placed in Stormvaults as a compromise — locked away where nobody could use them, preventing war between the Pantheon’s members.

How Were They Sealed?

Sigmar sealed each Stormvault with divine wards and enchantments tied to his own power. The locations were chosen for their remoteness or defensive properties — deep underground, atop impassable mountains, in pocket dimensions, or within magically concealed locations. Many were additionally guarded by constructs, bound spirits, or Sigmar’s own servants.

Crucially, Sigmar erased the knowledge of the Stormvaults’ locations from mortal memory. Only he and select members of the Pantheon knew where they were. This secrecy was the ultimate safeguard — you can’t open what you can’t find.

What Happened to the Stormvaults During the Age of Chaos?

When the Age of Chaos descended and Sigmar retreated to Azyr, the Stormvaults were left unattended across the realms. Several things happened:

Wards Weakened

With Sigmar’s attention focused on forging the Stormcast Eternals and defending Azyr, the divine wards on distant Stormvaults began to degrade. Some wards lasted centuries; others failed within decades. The Chaos corruption saturating the realms actively eroded magical protections, accelerating the degradation.

Knowledge Was Lost

Sigmar’s original intention was that only he would know the locations of the Stormvaults. But the cataclysm of the Age of Chaos, the shattering of his alliances, and the fog of centuries meant that even Sigmar lost track of some vaults. Records were destroyed, landmarks changed, and realms were physically altered by Chaos corruption. Some Stormvaults became truly lost — hidden from everyone, including their creator.

Some Were Discovered by Chaos

Chaos warlords and Tzeentchian sorcerers, drawn by the residual magical signatures of the Stormvaults, discovered and breached some of them. The contents — weapons of mass destruction, imprisoned entities — were turned to the service of Chaos. In several cases, the released contents caused secondary catastrophes that ravaged entire regions.

How Are Stormvaults Being Rediscovered?

In the current Age of Sigmar, Stormvaults are being found and opened through several mechanisms:

The Necroquake

Nagash’s Necroquake — a magical shockwave that disrupted all existing magic across the realms — caused many Stormvault wards to fail simultaneously. Vaults that had been stable for centuries suddenly cracked open, releasing their contents into the world. This was an unintended consequence that alarmed even Sigmar, who hadn’t anticipated that Nagash’s death magic would interact with his divine wards so destructively.

Treasure Seekers and Tomb Raiders

As civilisation has begun to re-establish itself in the reclaimed portions of the realms, explorers, scholars, and fortune seekers have stumbled upon Stormvaults. The Kharadron Overlords (sky-dwelling duardin merchants) are particularly active in seeking out vaults for their contents’ trade value. Free Guild expeditions mounted from the Cities of Sigmar also search for lost vaults.

Sigmar’s Own Agents

Sigmar has dispatched Stormcast Eternals to re-secure Stormvaults that he can locate. The Lord-Arcanum chambers in particular specialise in finding and containing magical threats. However, the Stormcast often arrive to find vaults already breached or their contents scattered across the surrounding region.

Chaos Forces Seeking Them

Tzeentch’s followers are obsessed with the knowledge and power contained within the Stormvaults. Arcanite cults devote generations to finding single vaults, and Tzeentchian Lords of Change use their prophetic abilities to divine vault locations. For Chaos, each opened Stormvault is a potential weapon against Order.

What Has Been Released from Stormvaults?

Several significant narrative events in Age of Sigmar involve opened Stormvaults:

The Katophrane Curse

The Katophrane Stormvault in Shadespire (now the setting for Warhammer Underworlds) was one of the first to be explored. Its contents included the cursed Katophrane relics — artifacts that bind souls and prevent death, trapping entire populations in an undying curse. The warbands fighting in Underworlds are trapped by these Stormvault-released curses.

Forbidden Weapons

Several narrative campaigns describe Stormvaults releasing weapons that shift the balance of power in regional conflicts. A blade capable of permanently killing Stormcast Eternals (preventing Reforging) was recovered from one vault — a weapon that terrifies even Sigmar’s supposedly immortal warriors.

Imprisoned Entities

Daemon Princes and elemental horrors sealed during the Age of Myth have been released when their vaults failed. These entities emerge confused, angry, and immensely powerful — often devastating the area around the vault before either being recaptured or escaping into the wider realm.

Where Are Stormvaults Located?

Stormvaults are scattered across all eight Mortal Realms. Their locations tend to share common characteristics:

Remote locations — Mountain peaks, ocean floors, desert depths, and deep underground caverns. Sigmar chose locations that were naturally difficult to reach.
Places of magical significance — Near Realmgates, on ley line intersections, and in places where the fabric of reality is naturally stronger. The magical infrastructure of these locations helped power the wards.
Ruins of Age of Myth civilisations — Some Stormvaults were built beneath the cities of the Age of Myth. When those cities were destroyed during the Age of Chaos, the vaults beneath survived — hidden beneath rubble and ruin.
Pocket dimensions — The most dangerous contents were sealed in vaults that existed in their own miniature sub-realms, accessible only through specific magical means. These are the hardest to find and the most dangerous to breach.

How Do Stormvaults Work in Age of Sigmar Games?

Narrative Campaigns

Stormvaults make excellent objectives for narrative campaign play. A campaign can centre on discovering a vault’s location, racing rival factions to reach it, breaching its defences, and dealing with whatever is released. The contents can be MacGuffins that drive an entire campaign arc.

Battleplans and Scenarios

Several official battleplans feature Stormvault-themed scenarios — a central vault objective that releases effects when captured, hazardous terrain representing collapsing wards, and escalating dangers as the battle progresses. These asymmetric scenarios create memorable gaming experiences.

Warhammer Underworlds

The entire premise of Warhammer Underworlds is built on Stormvault lore. Shadespire and its successor locations are Stormvault sites where warbands fight for control of Katophrane relics and other sealed artifacts.

What Do Stormvaults Mean for the Wider Lore?

Stormvaults serve several important narrative functions:

They provide ongoing plot hooks — Each new edition or campaign can introduce a newly discovered vault as its narrative driver.
They complicate Sigmar’s legacy — Stormvaults show that Sigmar’s decisions have consequences. He sealed these dangers away rather than dealing with them permanently, and now they’re coming back to haunt the realms.
They connect to the World-That-Was — Some vault contents predate the Mortal Realms, linking Age of Sigmar’s lore to the older Warhammer Fantasy setting.
They create moral complexity — Was it right to seal these things away? Should they be used against Chaos despite the risk? Different factions have different answers, creating rich narrative conflict.

Frequently Asked Questions

Are Stormvaults the same as the Stormkeeps?

No. Stormvaults are sealed containment vaults for dangerous artifacts. Stormkeeps are fortified military bases established by Stormcast Eternals during the Realmgate Wars — essentially castles and fortresses for Order’s armies. They share the “Storm-” naming convention because both are associated with Sigmar, but they serve completely different purposes.

Can Stormvaults be resealed?

In theory, yes — if a Stormcast Lord-Arcanum or other powerful mage can replicate Sigmar’s original wards. In practice, the knowledge of the original sealing techniques is incomplete, and the magical environment of the realms has changed since the Age of Myth. Most opened Stormvaults are either evacuated (contents moved to Azyr) or guarded by Stormcast garrisons rather than resealed.

How many Stormvaults exist?

The exact number is unknown even to Sigmar. Hundreds are confirmed in the lore, but many more remain undiscovered. Given that Sigmar created them across all eight Mortal Realms over the course of an entire age, the total number could be in the thousands. This open-endedness is deliberate — it allows Games Workshop to introduce new vaults in any future narrative.

Do Stormvaults appear in Warhammer 40k?

No. Stormvaults are specific to the Age of Sigmar setting. The Warhammer 40k equivalent would be sealed Space Marine vaults, Necron Tomb Worlds, or Inquisitorial black sites — similar concepts of sealed ancient dangers but within 40k’s sci-fi framework rather than AoS’s fantasy one.

What’s the most dangerous thing to come out of a Stormvault?

The lore doesn’t identify a single “most dangerous” release, but strong candidates include: weapons capable of permanently killing Stormcast (denying Reforging), the cursed artifacts of Shadespire that trap entire populations, and various imprisoned entities whose release caused regional catastrophes. The implication is that the most dangerous Stormvaults haven’t been opened yet — a narrative thread that creates constant dramatic tension.

What Are Stormvaults? — Sigmar’s Hidden Vaults