Whenever you land a critical strike on a creature or reduce a creature to zero HP, you can make a Performance check as part of that attack. If you beat a DC equal to five times your constitution modifier, roll a d6. You gain one of the following random benefits; 

 1-2   you can use your reaction this turn to restore HP equal to your 3d4 + CON modifier. Any excess healing is treated as temporary HP. 

 2-3  you can use your reaction this turn to move up to half your total movement and make a single weapon attack as part of this attack action. The target of this attack must be different than the target that triggered this effect.

 4      you can use your bonus action to gain two 1d10 charges of bardic inspiration (lasting 10 minutes), which can be added to any attack roll, damage roll, saving throw, or ability check. If you are already benefitting for bardic inspiration, keep both of the additional die, and expend them as you please. 

 5      as a bonus action, you can choose to enter a 1st-level barbarian rage until the start of your next turn.

 6      make your next weapon attack with advantage. This attack can also benefit from this ability, and can continuously stack if another 6 is rolled.