Blood Boil

1st-level Evocation
Casting Time: 1 action
Range: 30 feet
Components: V, S
Duration: Instantaneous
You cause the blood within a creature to heat up. The target must make a Constitution saving throw. On a failed save, the creature takes 3d8 fire damage. On a successful save it takes half damage.
At Higher Levels: When you cast this spell using a spell slot of 2nd level or higher the damage increases by 1d8 for each slot level above 1st.