Hellish Rebuke

Source: Player’s Handbook

1st-level evocation

Casting Time: 1 reaction, which you take when you are damaged by a creature within 60 feet of you that you can see
Range: 60 feet
Components: V, S
Duration: Instantaneous

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 level above 1st.

Classes: Warlock