Backlash

FRH

Level 4 Abjuration (Bard, Sorcerer, Warlock, Wizard)

Casting Time: 1 Reaction, which you take in response to taking damage

Range: 60 feet

Components: V

Duration: Instantaneous

Attack/Save: CON Save

Damage/Effect: Force

You ward yourself against destructive energy, reducing the damage taken by 4d6 plus your spellcasting ability modifier.
If the triggering damage was from a creature within range, you can force the creature to make a Constitution saving throw. The creature takes 4d6 Force damage on a failed save or half as much damage on a successful one.

Using a Higher-Level Spell Slot. The damage reduction and Force damage from this spell both increase by 1d6 for every spell slot level above 4.