Cauterize - Spell

You attempt to revert some of the damage a creature near you has taken. When a creature within your reach that you can see takes damage as a the result of an attack roll, you can use a reaction to try to immediately treat the wound. The attacker must make an Intelligence saving throw against your spell save DC. On failure, your target is healed for 1d4 hit points immediately after the attack. On success, your target sustains 1d4 magical fire damage.

At Higher Levels: The spell’s damage and healing both increase by 1d4 when you reach 5th level (2d4), 11th level (3d4), and 17th level (4d4).