Poison tokens are used to hunt for fnōrd and hlák. Any Poison used here counts as an extra triber. To use Poison, place a triber on an available space as normal, then take a Poison token from your tribe board and place it on a space marked with a skull below the triber

you have just placed.You may only use one Poison token per triber sent. In solo and two-player games, each player may only use one Poison token per area.