The Axe of Forseti

Weapon (battleaxe), unique (requires attunement by a lawful good or lawful neutral creature)

Attacks made with the Axe of Forseti receive a +2 bonus to attack and damage rolls.

Justice. Whenever a chaotically aligned creature takes damage from this weapon, that creature must make a successful DC 14 Wisdom saving throw or take 1d10 radiant damage. Creatures who fail this saving throw take 1d10 radiant damage at the beginning of each of its turns for 1 minute. The creature may repeat the saving throw at the end of its turn, ending the effect on a successful save.

Retribution. You may use your reaction to target one creature that attacked you since the end of your last turn. The targeted creature receives disadvantage on its next attack made against you until the beginning of your next turn.