Desicate

You reach out and pull water from an organic living creature such as a plant, animal, or humanoid. The target takes 1d8 + your WIS modifier of necrotic damage, with half on a successful CON save. Half of the taken damage amount is transferred to the caster as temporary hit points. Affected targets experience intense thirst and dry skin. The damage increases by 1d8 for every additional level it is cast at. When cast at level 5 or higher, the target must succeed a DC15 CON save or take a point of exhaustion.

Small plants are completely destroyed by this spell. Creatures made of water, such as water elementals, take double damage. Creatures containing no water, like earth elementals, are immune to the effects of the spell.