De Capo

De Capo

When I was trying to figure out how to murder a werewolf and keep them werewolf shaped even when the Moon was not up, my dear friend and beta Venise and I sat down with a couple of drinks, a laptop and some sketchy notions of chemistry, alchemy and naturopathy. We knew that it would have to be a very special type of potion. Not simply a potion, but a mixture of wand work and potions that would finally convince Snape that perhaps wand work was necessary to potions in some special circumstances, and if the two were mixed the results would be extraordinary. (Setting up for Angelinus, you see, which is hte next book in the series, starting to be up-loaded very soon.) So, some five hours and a lot of research later, this is what we came up with. Bob ordered me to bed at midnight so Venise refined it to its final and very effective form. I don't know how much of it will up-load through FFNet as they have some odd policies on things but here goes!

A word of caution. The chemical analysis at the end of the potion is REAL AND TRUE. If anyone mixed this potion and took it - even without the wand work - I can guarantee it would put period to your existence so please, no stupid stuff!

Werewolf Induction/Reduction Charmed Potion

(Makes enough potion to treat one Werewolf.)

Potion Ingredients

Fine Ground White Moonstone

Purple moonflower (Ipomoea muricate) seeds

Moon jellyfish eggs

Aloe Vera plants, (washed and skinned.)

Moonshine Base Potion

In a White Alabaster Mortar, pulverize 27 Purple Moonflower seeds to a fine powder.

Take 18 Fertilised Moon Jellyfish eggs collected on the King Tide and add to mortar. Work seed and eggs into smooth paste.

Juice sufficient Aloe Vera leaves to make 100mls pure Aloe Vera inner gel extract.

Place in a number 2 cauldron and heat to blood temperature, stirring anticlockwise, three hundred and sixty degrees every sixty seconds with glass rod.

Add 10 mg powdered moonstone in 1mg increments every third rotation.

On completion of the moonstone addition change stirring rod to ebony blending spatula. Use an alternating clockwise/anticlockwise 180 degree motion every 2 seconds to blend, using a 2ml porcelain measuring spoon, 20 ml in 2ml increments of egg/seed mixture.

When all ingredients are combined remove heating spell and leave to cool to ambient temperature.

Whilst the potion is cooling construct the Encased silver nitrate crystals

Encased Silver Nitrate Crystals

Crystalline Silver Nitrate (no width greater that 5 mm)

Powdered Bone of Werewolf Vertebrae

Sodium Arsenate Crystals (see below)

Doxy Blood


Taking a medium Black Granite Mortar add 100 g powdered Werewolf Vertebrae and 100g Sodium Arsenate crystals, combine to an even consistency.

Add 125 drops of Doxy Blood one drop at a time fully combining after each addition.

Roll out the mixture to an even 2mm thickness 5 cm by 10 cm, using a black granite rolling pin and an iron number 25x2 tablet guide. Cut into two 5cm squares using an iron blade.

Place one square of mixture onto a number 25 tablet mould and primary press.

Put one sized Silver Nitrate Crystal in each of the 25 indentation. Ensure that the crystals are centred and not oversized and secondary press.

Place the remaining 5cm square of mixture evenly on the tablet mould and tertiary press.


Using a White Ash Combining Spatula carefully combine the Encased Silver Nitrate Crystals into the Moonshine Base Potion ensuring none of the Encased Silver Nitrate Crystal casings are compromised.

Place in a cork stoppered pure silicate glass vial.

The potion will retain it potency for up to three days after production.


Cast a 'WingardiumLeviosaLupus' charm on the potion.


When required, translocate the Werewolf Induction/Reduction Charmed Potion into the stomach of the target, wait 2 hours for retrieval of goods.

Addendum:- For greater safety and accurate retrieval, a tracking charm can be added so one can apparate to a save location to wait out the 2 hours. Be warned, however, that a tracking charm can also be reversed to find you if the Werewolf Induction/Reduction Charmed Potion use is ever discovered.


The passivity of the Aloe Vera aids in the absorption of the active ingredients. The Moonstone, Moonflower and Moon Jellyfish Eggs provide the 'moon light effect' required to support the charm's raising of the werewolf to the surface of mind and body. The charm is required to mimic the gravitational pull on the werewolf, as the full moon does. (if left unimpeded this effect would last 24-48 hours). The Moonflower (being the slowest, but most powerful of the ingredients) requires around sixty minutes (give or take ten minutes depending on body mass) to take effect.

The Sodium Arsenate in the coating of the Silver Nitrate aids in the mutation whilst combining with the Silver Nitrate to make a readily absorbed salt compound as it is dissolving. The coating on the silver nitrate is design to last two hours, the doxy blood is used to control the period of time it will take the stomach acids to dissolve the calcium of the bone ensuring that the transformation has occurred before the neutralisation of the werewolf.

From Real Websites

sodium arsenite


ISO 765

IUPAC: sodium arsenite or sodium meta-arsenite

CAS: sodium arsenenite

Reg. No.: 7784-46-5

Formula: AsNaO2


herbicides (arsenical herbicides)
insecticides (arsenical insecticides)
rodenticides (inorganic rodenticides)


This substance is considered by the International Organization for Standardization not to require a common name.


A data sheet from the Compendium of Pesticide Common Names

Safety (MSDS) data for sodium arsenite


Synonyms: sodium (meta)arsenite, arsenous acid sodium salt, sodium metaarsenite, Atlas A, chem pels C, chem-sen 56, Kill-all, penite, prodalumnol, sodanit, various trade names
Molecular formula: AsNaO2
CAS No: 7784-46-5
EC No: 232-070-5

Physical data

Appearance: white granular crystals
Melting point: 615 C
Boiling point:
Vapour density:
Vapour pressure:
Specific gravity: 1.87
Flash point:
Explosion limits:
Autoignition temperature:


Stable. Incompatible with strong oxidizing agents, strong acids. Protect from moisture. Absorbs carbon dioxide from air.


May be fatal if inhaled, swallowed or absorbed through the skin. IARC human carcinogen. Mutagen. May alter genetic material. Eye, skin and respiratory irritant. Causes dermatitis.

Toxicity data
(The meaning of any toxicological abbreviations which appear in this section is given here.)
ORL-RAT LD50 41 mg kg-1
ORL-CHD LDLO 2 mg kg-1
IPR-MUS LD50 1 mg kg-1
SKN-RAT LD50 150 mg kg-1
SCU-MUS LD50 10 mg kg-1

Risk phrases
(The meaning of any risk phrases which appear in this section is given here.)
R23 R25 R45.

Transport information

(The meaning of any UN hazard codes which appear in this section is given here.)
Hazard class: 6.1. Packing group: II

Personal protection

Safety glasses, gloves, good ventilation. Do not use this compound unless no alternatives are available. Ensure good lab practice is used at every stage of its handling.

Return to Physical & Theoretical Chemistry Lab. Safety home page.

This information was last updated on August 26, 2005. We have tried to make it as accurate and useful as possible, but can take no responsibility for its use, misuse, or accuracy. We have not verified this information, and cannot guarantee that it is up-to-date.