Badge of Rebuke

This ring has 3 charges. As a reaction to being hit by a melee attack, you can expend a charge to do 2d8 damage + 1d6 random type. When the amulet has 0 charges left your AC is +2. The number on the dice decides what the damage is:
1 is 1d6 fire
2 is 1d6 lightning
3 is thunder and does 1d6 and hit everything within 5 feet
4 is force and pushes the target back 5 feet
5 is cold and reduces speed by  10 ft
6 is based on alignment;
Good, the target shines with light and the next attack has advantage. The damage is radiant
Evil is necrotic and regains health equal to damage.
It gains 1d4+1 charges per dawn