|Category Number||Category Name||Lethal Quantity||Lethal amount for a 150 lb human|
|6||supertoxic||less than 5mg/kg||less than 7 drops|
|5||extremely toxic||5-50 mg/kg||7 drops to 1 teaspoon|
|4||very toxic||50-500 mg/kg||1 teaspoon to 1 ounce|
Example 2: Cobra (and related snake) venom. This extensive listing begins with a physical description of the different venomous snakes in this family. The descriptions also tell of any special properties that the snake or its venom has. Following that, the authors inform us that cobra venom is a neurotoxin of toxicity 6. It kills by progressive paralysis that eventually stops the lungs and suffocates the victim, generally within two hours. Other symptoms include low blood pressure and possibly convulsions. The listing also includes descriptive case histories and the reader will discover that cobra venom is also lethal if swallowed or absorbed through the skin.
So how do you turn the Deadly Doses rating system into a poison system for RPGs? This is clearly easier to do in a level-free system like Hero. The character simply makes a CON roll at appropriate modifiers for the severity of the dose. Success means minimal lasting damage, failure means life threatening injury. But what about a level-based system like Rolemaster? For the purpose of this system (and, let's face it, realistically), the poison is always the same strength relative to the character's skill and experience level. So simply have the characters roll against a poison of their own level. For a first level PC, the poisons are all first level, for a tenth level character, all poisons are treated as though they were tenth level. And just like resisting a spell cast by someone of the same level, to succeed you need to break 50. So:
|Percent of Lethal Dose||1-10%||20-40%||40-60%||60-80%||80-100%|
|Suggested Rolemaster Con Roll Modifications||+50||+25||+/- 0||-25 |
|Suggested Hero System Con Roll Modifications||-8||-4||+/- 0||+4||+8|
|Rolemaster: Character must roll and add Con bonus and any modifiers. Success results from breaking 50. |
For Hero, success means rolling under (CON/5)+9 after modifiers.
Success means that, while the character may be incapacitated in the short term, he will suffer no lasting effects. Success
by more than +25 can be taken to mean minimal acute effects as well. I.e. the characters may feel rotten, but they can function effectively when it counts.
For a more lethal system, simply increase the detrimental modifiers. You could, for example, decide that a sequence of +50, +25, +/-0, -50 and -75 (optional suggested modifiers, above) is more suited to your world. This has the advantage of only hurting super-stat characters. Normal folk are going to fail at those doses regardless.
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