Cone of Slugs

You open your mouth and emit a dense cone of slugs. The slugs are launched at high speeds splattering and bludgeoning everything in a 15 ft cone. Creatures caught in the cone must make a Constitution saving throw. On a failed save the creature takes 1d8 damage and has disadvantage on the next turn. If they succeed they take half the damage, and are otherwise unaffected

This spell's damage increases by 1d8 for every 2 spell slot levels above 1st.