Adrenaline Ring

This ring adds a +1 to all attack and damage rolls. As you hit creatures it increases in effectiveness. If you deal at least 10 points of damage on a turn, the rings +1 increases to a +2 on attack and damage rolls, failing to deal 10 points of damage on a turn will revert a +2 back to a +1. If your very next turn deals at least 20 points of damage, it turns into a +3. The ring remains as a +3 as long as you deal 20 points of damage every turn, failing to do so will revert the ring back to a +2.

This ring has one charge. You may expend this charge while your ring has a +3 to attack and damage rolls to turn a regular hit into a critical hit. Doing this reverts the ring back into a +1 until you regain the charge on the next dawn. As long as the one charge is missing, it cannot increase past a +1. 

Notes: Bonus: Magic