Blood Boil

You hold out your hand towards a creature within range and attempt to forcibly raise the temperature of its blood, forcing it to make a Constitution saving throw. On a failed save, a creature takes 4d6 fire damage and is incapacitated until the beginning of your next turn. On a successful save, a creature takes half damage and isn’t incapacitated.

A creature that does not possess blood, such as an undead or a construct, is immune to this spell.