Reckless Ring of Magic (5e Equipment)

Ring, rare (requires attunement)

Destructive Spells. While you are attuned to and wearing this ring, you may enhance the destructive capabilities. When you would deal damage with a spell, as a bonus action, you may expend and roll one of you hit dice. Your spell then deals additional damage equal to the dice roll. This effect may be used 4 times, and this weapon regains all expended uses at dawn.