Darastrix's Nauseating Poison

You extend your hand toward a creature you can see within range and project a puff of noxious gas from your palm. The creature must succeed on a Constitution saving throw or take 2d8 poison damage and forgo their next turn, spending it vomiting

This spell's damage increases by 1d8 when you reach 5th level (3d8), 11th level (4d8), and 17th level (5d8).