Hellish Rebuke

D&D 2014 spell: Hellish Rebuke. Source: Player's Handbook (2014). level 1, school Evocation, casting time 1 reaction, which you take in response to being dam...

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

At Higher Levels When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 2d10 for each slot level above 1st.

Source: Player's Handbook (2014), p. 250 - Licenses and attribution