Slow Poison

Slow poison is mixed from 1 dr. of mercury and 3 drs. of spider venom and fed to the victim a tiny amount at a time, every day, in food or drink. He weakens steadily, losing 1 point of Constitution every 2 days. Once his Constitution falls to 5 or below he is confined to bed, and when it reaches 0 he dies; there is no save.

Poisons are liquids that must be swallowed, so they are hidden in food or drink. Each dose takes a full day to prepare with a mortar and pestle, a small cauldron or crucible and a steady heat source, with a 90% chance of success plus 1% per level (99% at most). The work is extremely dangerous: the maker saves vs Dexterity, +1 per level, or is exposed to the toxin. In most of the Atlantean world only alchemists may legally possess poisons, and elsewhere a dose sells illegally for 200-600 G.P.