Badberry

Up to ten berries appear in your hand and are infused with magic for the duration. A creature can use its action to eat one berry. Eating a berry deals 1 point of poison damage, and the target has to make a constitution saving throw against your spell save DC. If they fail, they are considered poisoned for 24 hours. A lesser restoration spell can remove this effect.

The berries lose their potency if they have not been consumed within 24 hours of the casting of this spell.