Creeping Starch

You crush the grub infested potato to call forth a swarm of crawling, rotten potato skins that take up a 10 feet radius area within the range of the spell. A creature that starts its turn in contact with the swarm or enters its area for the first time makes a Wisdom saving throw and takes 4d10 psychic damage, or half as much on a successful save, as they hallucinate their skin sprouting shoots from a tuberous plant and flesh decaying and is paralyzed on a failed Wisdom save. Creatures can make an additional save every turn to end the paralysis condition. You can move the swarm 10 feet with a bonus action.