Damage dealing cantrips are pretty much guaranteed to one shot commoners and have a decent chance on low HP enemies.
Create water would have a lower chance if it was created in their lungs since they could cough it out, and at best get disadvantage for a round. Unless they were in a limited space where they couldn’t get their head out, then it would drown them like putting flammable substances on them and then throwing a Fire Blast.
All that said, I wouldn’t allow them to make water in the lungs because it doesn’t fit the theme of the spell any more than being able to cast Create Flame inside the lungs.
Damage dealing cantrips are pretty much guaranteed to one shot commoners and have a decent chance on low HP enemies.
Create water would have a lower chance if it was created in their lungs since they could cough it out, and at best get disadvantage for a round. Unless they were in a limited space where they couldn’t get their head out, then it would drown them like putting flammable substances on them and then throwing a Fire Blast.
All that said, I wouldn’t allow them to make water in the lungs because it doesn’t fit the theme of the spell any more than being able to cast Create Flame inside the lungs.