Desiccate

The caster chooses one living thing within sight and draws all moisture and vitality from it. A creature targeted by this spell must make a Constitution saving throw or take 4d6 necrotic damage and be slowed until the casters next turn.

Plants and small animals wither and die instantly.

Casting this spell using a spell slot of 4th or higher adds a d6 to the damage roll per slot above 3rd level and heals the caster for half of the amount of damage.