Casting Time: 1 reaction, which you take in response to being damaged by a creature within 60 ft of you that you can see.
You point your finger, and the creature that damaged you is momentarily surrounded by hellish flames. The creature must make a Dexterity saving throw. It takes 2d10 fire damage on a failed save, or half as much damage on a successful one.
At higher levels: When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d10 for each slot above 1st.