Tivra's Poison Spray

You launch a haze of potent toxin at a creature within range. Make a ranged spell attack against the target. On a hit, the target takes 1d6 Poison damage and must succeed a Constitution saving throw or take an additional 1d6 Poison damage at the start of each of it's turns for a minute. A target may repeat this save at the end of it's turns, ending the effect on a success.

Cantrip Upgrade. The damage increases by 1d6 when you reach levels 5 (2d6), 11 (3d6), and 17 (4d6).