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Published by Samuel Penn.

Also, see my profile for things that interest me.

Glendale Website - My main web site.

Yags - Main site for yet another game system, a generic GPL'd tabletop RPG.

Yagsbook - Documentation on the Yagsbook RPG documentation format, a Sourceforge project.

Mapcraft - Documentation on world mapping tools, another Sourceforge project.

Midnight Saga - An Ars Magica campaign.

Active Topics

The current topics are currently under active development (relatively speaking).

Yags is Another Game System - Game design notes for Yags, a Free roleplaying game system I use as the core system for most of my campaigns.

Yagsbook - Notes on an XML based documentation system I use for documenting Yags and related campaigns.

Full Thrust - Notes on Full Thrust

Stargrunt - Notes on Stargrunt.


Herb Lore

Herb information will consist of a mixture of generic and system specific information. All herbs have a potency rating which is a system independent guide to how potent it is - will use the potency tables in 'Deadly Doses: A Writers Guide'. On a scale from 1 to 6, where 1 is pretty ineffective and 6 is highly toxic.


The term herb is used to describe all manor of chemicals. They can be harmful or beneficial. Some are hallucigenic. Not sure how yet to deal with potency/resistence and healing herbs.

Also need to look at addictive herbs at some point as well.


Potency Lethal dose Example for adult male
1 (very weak) 15g+/kg About a litre.
2 (weak) 5-15g/kg Up to a quart.
3 (moderate) 0.5-5g/kg Up to a pint.
4 (strong) 50-500mg/kg Up to an ounce
5 (very strong) 5-50mg/kg Less than a teaspoon.
6 (super strong) 5mg/kg A taste.

The statistics given for each type of herb assumes the dose suggested above. More or less can increase the effectiveness. Sometimes, too much can have the opposite effect, especially if the host's body rejects it too quickly for it to have an effect.

Potency also assumes the prepared form. Preparation will be listed in the description.


The method of administring a poison is normally one of ingestion, inhalation, injection or contact. Contact poisons will work normally if injected or ingested. Other types will probably not work on contact (though will have a reduced effect if they do) and may or may not work if administered by another means.

Preperation of Herbs

Need notes on how to prepare a herb, how difficult it is to find and where it is found. All of this can be kept generic, though may need system dependent notes on how to interpret it (e.g. 'Easy' in Ars Magica might mean difficulty 6, in Yags it would be 15).

See Herb Lore for a discussion of how poison rules work in Yags.

Example XML

The following XML example gives a description of Aconite, also known as Wolfbane.

<herb name="Aconite">
        <aka>Monk's Hood</aka>
        <frequency region="Europe">Common</frequency>
        <preparation time="Minutes">Easy</preparation>
        <!-- Poison, Hallucigen, Soporforic, Remedial -->
        <use>Protects from werewolves</use>
        <use>Mild poison<use>
        <short>A purplish blue flower used to poison wolves.</short>
    <statistics xmlns="">
        <method usage="Ingested">
            <time>5 minutes</time>
    <statistics xmlns="">
        <primary>1d6 hp</primary>
        <seconday>1d4 Dexterity</secondary>
yagsbook/herblore.txt · Last modified: 2015/02/04 22:40 (external edit)