Harvested from the dark boughs of the death’s head willow is a powerful intoxicant. Careful inspection shows that it seems to move on its own as if it were alive and drawn to blood. It can be smoked as a concentrate or injected directly into the bloodstream.

A creature subjected to a dose of black sap cannot be charmed or frightened for 1d6 hours.

For each dose of black sap consumed, a creature must succeed on a DC 15 Constitution saving throw or become poisoned for 2d4 hours—an effect that is cumulative with multiple doses. *Save failure by 5 or more causes addiction and exhaustion *Save failure by 10 or more causes Death Save or become a zombie for 2d8 days.