Hellish Rebuke [Адское возмездие]
1st level, Evocation
Casting time: 1 reaction, which you take in response to taking damage from a creature within 60 feet of you that you can see
Range: 60 feet
Components: V, S
Duration: Instantaneous
Classes: Warlock
Subclasses: Oathbreaker (Paladin)
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.
Source: D&D System Reference Document 5.1, © Wizards of the Coast LLC, licensed under CC BY 4.0.