Ricin

TL0; $1. LC1.

Ricin is a digestive poison extracted from the seeds of castor beans (Ricinus communis); the natural seeds are also digestive poisons (TL0). It has an 8 hour delay. Roll vs. HT-2 at this time. If the target succeeds, he takes 3d toxic. Survivors must roll vs. HT or permanently lose 1 HT to organ damage. A successful Physician roll by an attending doctor gives +1 to these HT rolls. No distinctive taste. Holdout rolls are at +6; Sleight of Hand rolls are at +4.

Source: GURPS 4th - Mysteries, page 37