Amphibious Assault

Poisonous frogs emanate from you in a 30-foot cone. Each creature of your choice in that area must make a Constitution saving throw. On a failed save, a creature takes 3d8 poison damage and is poisoned for 1 minute. On a successful save, a creature takes half as much damage and isn’t poisoned

In addition, one creature of your choice in that area can spend and roll one of its unspent Hit Dice and regain a number of hit points equal to the roll plus your spellcasting ability modifier.

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, increase the poison damage by 1d8 for each slot level above 2nd, and the number of Hit Dice that can be spent and added to the healing roll increases by one for each slot above 2nd.