Wondrous potion · Memory magic
Lethe Potion
The Lethe Potion is a mouthful of dark, still water that steals the drinker’s previous hour. The deeds remain, the wounds remain, and the evidence remains—but the path between them disappears.
“The vial does not destroy memory. It carries memory downstream, beyond the drinker’s reach.”
Game Statistics
Choose the Lethe Potion rules tab used by your campaign. Without JavaScript, all three versions remain visible and usable.
Lethe Potion — 5.5e
- Potion, rare
- No attunement
- One use
- Save DC 15
- Drink or Administer. As a Bonus Action, a creature can drink the potion or administer it to a willing or unconscious creature within 5 feet. The vial is consumed when used.
- Oblivion. The drinker makes a DC 15 Wisdom saving throw and can choose to fail. On a failed save, every memory the drinker formed during the previous hour becomes inaccessible. The drinker recognises that time is missing but cannot recall what happened during it.
- What Remains. The potion does not remove languages, proficiencies, class features, prepared spells, personality or knowledge acquired before the lost hour. Injuries, conditions, expended resources, written notes and every other consequence of the forgotten hour remain unchanged.
- Restoring Memory. Remove Curse, Greater Restoration, Heal or Wish restores the suppressed memories. Water consecrated to Mnemosyne has the same effect when used as part of a short rest.
- Repeated Doses. Additional doses suppress only the hour immediately preceding each dose. Drinking several at once does not extend the erased interval.
Lethe Potion — Pathfinder 1e
- Aura faint enchantment
- CL 5th
- Slot none
- Price 750 gp
- Weight —
Drinking a Lethe potion is a standard action that provokes attacks of opportunity. The drinker must succeed at a DC 14 Will save or permanently lose access to all memories formed during the previous hour. A willing creature can choose to fail this save.
The missing memories return when the drinker receives remove curse, break enchantment, heal, limited wish, miracle or wish. Restoring the memories causes no damage or condition, although the returned experiences can still carry their ordinary emotional consequences.
The potion changes memory only. It does not remove conditions, restore expended spells or abilities, heal damage, undo movement or alter physical evidence.
Construction
Requirements Brew Potion, lethe; Cost 375 gp.
Lethe Potion — D&D 3.5e
- Aura faint enchantment
- CL 5th
- Market Price 750 gp
- Weight —
The creature drinking this potion must succeed on a DC 14 Will save or forget everything it experienced during the previous hour. The loss is permanent until reversed, but the creature retains its abilities, languages, prepared spells and memories from before the affected period. A willing creature can voluntarily fail the saving throw.
Remove curse, break enchantment, heal, limited wish, miracle or wish restores the missing memories. All physical and mechanical consequences of the forgotten hour remain in place.
Construction
Prerequisites Brew Potion, lethe, caster level 5th; Cost to Create 375 gp + 30 XP.
What the Lost Hour Means
The potion suppresses recollection; it does not rewrite reality. Use the missing hour as an investigative problem. Characters can reconstruct their actions from wounds, witnesses, disturbed rooms, written messages and resources they no longer possess.
| Event during the hour | After drinking | Table ruling |
|---|---|---|
| The character learns a password or meets a stranger. | The new information and meeting are forgotten. | The character can learn them again from another source. |
| The character suffers a wound, curse or poison. | The effect remains, but its cause is forgotten. | Do not restore hit points or end the condition. |
| The character casts spells, spends charges or loses equipment. | The resources remain spent or missing. | The character knows the current total, not how it changed. |
| The character writes a note, draws a map or leaves a signal. | The physical record remains legible. | Reading it does not restore the original memory. |
| The character practises an existing skill or speaks a known language. | The underlying ability remains. | The potion removes episodes, not established capabilities. |
| The character drinks more than one dose at the same moment. | Every dose targets the same preceding hour. | The erased period does not stack or multiply. |
Lethe Potion Appearance, Brewing and Detection
Recognising the Potion
At rest, the liquid is clear and colourless. When disturbed, a thin grey current moves against the turn of the vial. Reflections in the glass lag a heartbeat behind the observer, and the stopper smells faintly of wet stone and crushed poppy.
A tiny taste produces a harmless blank moment: the taster forgets the flavour before swallowing. This clue identifies the potion’s theme without triggering its full effect.
Brewing the Draught
The formula calls for stagnant river water, black poppy seed, a silver coin polished until its face is blank, and a memory voluntarily spoken over the open vial. Authentic brews contain a single drop carried from the Realm of Hades; mortal imitations bind the same enchantment into ordinary water.
The exact work, time and expense follow the campaign’s normal magic-item creation rules and the edition statistics above.
Using Lethe Potion in a Campaign
A Lethe potion is strongest when it creates evidence without explanation. It should complicate testimony and identity, not erase an entire adventure or take a character’s established abilities away.
The Stolen Hour
The party awakens with the same hour missing. One carries a royal seal, another has fresh grave soil beneath their nails, and a third has written: “Do not restore us until dawn.”
The Honest Witness
A witness passes every truth-detection test because the incriminating memory is genuinely inaccessible. The investigation turns toward the empty vial hidden among ordinary medicines.
The Voluntary Draught
A courier drinks Lethe potion before capture, trusting a written cipher and a priest of Mnemosyne to return the message after the border has been crossed.
The Counterfeit River
An apothecary sells cheap imitations that erase names rather than hours. The victims remember every deed but cannot recognise the people who shared it.
Historical and Mythological Context
Lethe means forgetfulness or oblivion. Greek traditions use the name both for an underworld power and for waters associated with the loss of memory. In Theogony 226–227, Hesiod names Lethe among the children of Eris, making Oblivion a consequence of Strife.
Later accounts place forgetful waters in the underworld. Plato’s Myth of Er describes souls crossing the Plain of Lethe and drinking from the River of Unmindfulness before rebirth; those who drink without restraint forget everything. The tradition is preserved in Book X of Republic.
Forgetfulness was not always treated only as punishment. Pausanias describes paired springs at the oracle of Trophonius: the visitor drinks from Lethe to forget previous concerns, then from Mnemosyne to remember the revelation received below. This opposition between oblivion and memory gives the potion its cleanest countermeasure. See Pausanias 9.39.8 and the waters of Mnemosyne.
Within SpiralWorlds, the Lethe Potion is an alchemical echo of the genuine river described in the Realm of Hades. It borrows a measured fragment of Lethe’s authority: one mortal hour rather than the obliteration of an entire life.
Sources and Licence
Game Source
The original one-hour memory-loss item is adapted from Liber Mysterium: The Netbook of Witches and Warlocks. The edition conversions, adjudication guidance, mythology notes and campaign material on this page are SpiralWorlds additions.
Section 15: Copyright Notice
Open Game License v 1.0a Copyright 2000, Wizards of the Coast, Inc.
System Reference Document Copyright 2003, Wizards of the Coast, Inc.; Authors Jonathan Tweet, Monte Cook, Skip Williams and Bruce R. Cordell, based on original material by E. Gary Gygax and Dave Arneson.
Liber Mysterium: The Netbook of Witches and Warlocks Copyright © 2003, Timothy S. Brannan and the Netbook of Witches Team.
Historical Sources
Hesiod, Theogony 226–227; Plato, Republic 10.621; Pausanias, Description of Greece 9.39.8.
Artwork
Mary Magdalene, c. 1858–60, by Frederick Sandys (1829–1904). Oil on wood panel; Samuel and Mary R. Bancroft Memorial, Delaware Art Museum. The exact locally hosted image from the existing Lethe Potion page is retained.