Ambrosia

The immortality elixir at the heart of the under-prison beneath the Grey Vale Cave — finally given a name in Session 30. Manufactured (or refined) by the vanished Elder race in a strictly limited supply, it grants ageless life: a drinker no longer dies of time, though they can still be killed. It also appears to have an expiration date — the raiders who drank it 400,000 years too late kept living but rotted, which is why Malifax persists as bare bone.

To the people who once ran the world, drinking unauthorised Ambrosia was nearly murder: the elixir was rationed to those judged worthy, and to steal and drink a portion meant the person it was meant for would die of old age instead — "you stole someone else's life." Every prisoner of the under-prison is jailed for that one crime and nothing else.

Its purity matters (the GM's "Breaking Bad" analogy): source-grade Ambrosia leaves the drinker intact (the Nice One is normal), while spoiled or watered-down batches twist them — the worm-like Ruined One, the perishing Sad One, the skeletal Malifax, the tentacled janitor Gerald. The worthy who drink it are then placed in the ice to outlast a coming meteor/extinction, to be thawed when the world is safe.

Its full name is "Aevum Ambrosia" — now confirmed in writing. The under-prison's own system record, Holding Facility AR53, states in its primary-function line that the facility "houses individuals convicted of the theft and consumption of Aevum Ambrosia." The table's best-guess rendering was right; the rival hearing "Aethelric ambrosia" (a collision with Aethelric) is dead, and the table's "live long forever juice" / "forever life juice" were only nicknames. This is the same lost "ability to live forever" the Live Long council and Malifax drank, and that the Nice One was jailed for stealing.

In the written record

• The AR53 entry (the prison's own paperwork). Holding Facility AR53's system record names the crime it exists to hold — "the theft and consumption of Aevum Ambrosia" — under a rehabilitation-first doctrine aimed at "correction, accountability, and preparation for reintegration." It confirms the name, the one-crime rule, and Gerald's Session 30 account almost word for word, and it treats the offence as minor: threat rating minimal, maximum capacity 12, a transitional site used before "release, reassignment, or transfer to civic service programmes." The people who built the world rated stealing a life as a correctable civic offence — the horror of it was in the sentence's arithmetic, not its severity.
• The Hollow House rumour (unconfirmed, and much older). In the gravekeeper's diary recovered at The Hollow House (Session 42), the townsfolk explain the four scholars' unaging by saying they had found "some physic in the old stones, some draught or powder what keeps death from the threshold." That is a folk description of exactly this elixir's profile — and the scholars in question were spending their lives reading Elder-race tablets, the same people who made it. The record never confirms a draught was found; what it shows is that the longevity and the study of the Ancients ran together in one hall. See Connections & Theories.

Session 30

• Named and explained. Gerald (via Valmora's Tongues) and the Nice One (via Silithane) lay out its nature: the one crime of the prison, the stolen-life logic, and the varying purity that deforms some immortals and spares others.
• The ice. The worthy who drink it are frozen to survive a coming meteor; Gerald's wife Alice is among the sleepers, and Gerald himself drank a stolen, spoiled bottle during the raid — accidentally outliving his own mortality.

Session 52 (the elixir = the god-weapon)

• Ambrosia and the Shard are the same substance. The hidden Foredweller research facility under the Middle Tor reveals that the green crystal the Ancients refined — the "panache" — both creates and destroys life: it is this immortality elixir and the god-slaying Shard of the Autarch material, one Foredweller craft with two edges. The rationed "live-forever" substance the Live Long council and Malifax drank, and the god-killing Shard Eldrich the Elder is buying, trace back to the same green shard the Foredwellers mastered. The prison's immortality lore and the war's god-weapon race are, it turns out, the same story. Still level 7.