Ant Pile Shoes

You choose a creature you can see and say Ants attacks!  You conjure up 2 fire ant piles, one around each foot of a creature in range, and they take 2d6 poison damage (1d6 per ant pile) as the ants start to bite their legs. The creature being affected by this cantrip continues to take 2d6 poison damage (1d6 per ant pile) per turn until the creature rolls a wisdom save of 13 or higher to end the spells effect. You gain 1d6 added to your damage rolls for this spell per every 2 levels your character gains. (example: 2d6 at level 1. 3d6 at level 3. 4d6 at level 5. etc...)