Let it out!

Every time you take a hit or fail to hit an enemy, roll a d20. If you a roll a 1,  'Let it out!' will be triggered adding +1 to your next damage roll. Every time you don't roll a 1 after being hit or failing to hit an enemy, the trigger will increase by 1 i.e. the second time you roll a d20 you will need a 1 or a 2 to trigger 'Let it out!'. The longer 'Let it out!' goes without being triggered, the higher the extra damage will be. If you go a full round without taking a hit or you are charmed, the trigger will reset to 1.