Firstly, poison weapons may not be crafted - instead certain items may be poisoned after they have been created.
There will be a number of different kinds of poisons - obtainable through druidry or from killing wild poisonous animals - different poisons would have different effect.
- - Strenght
No blood clothing
The weapon itself is deleted and in its place appears a poisoned weapon graphic (same quality) with datavalue used to differentiate between poisons. Clicking on the weapon tells you what poison there is "You see Serinjah-Sword Poisoned with [ ] "
Poisining the weapon itself increases poison skill, and determines how many attempts you get at poisoning the target (from 1 - 7) (in the case of ammunition, poison skill simply determines how many arrows you can make from each bottle)
When the weapon is equipped, every single time it hits, there is a chance of poisoning the target. If the poisioning succeds, the person suffers a lte of -3 to that attribute for a period of time depending on the poisoner's skill. Either way, the weapon loses a 'poison attempt', which when they reach 0, decomposes it into the normal weapon. Arrows don't suffer from this effect.
Removing poison is as simple as drinking a well-made-enough antitode, or just waiting it out. A message should be received when you're poisoned which details the type of poison you took.
This way, poison does not remain a "Insta-kill" but actually an interesting way of reducing a powerful opponent to your level.