La Verdea

You transform a small container of water into a potent poison. The container is transformed into a poison potion. As an action, the poison can be thrown at a creature within range, requiring a ranged attack roll to hit. On a hit, the target takes 4d4 poison damage. The poison remains potent for 1 hour before reverting to water. When cast using a spell slot of 2nd level or higher, the damage increases by 2d4 for each slot level above 1st.