Critical Virtuoso is a passive feature that lets you attack again when you score a critical hit.
Description
When you score a Critical Hit you can spend a 
Bonus action to make an additional attack.
Condition: Critical Hit!
Duration: 1 turn
- You've critically hit an opponent, dealing more damage.
How to learn
Granted by the weapons:
Combination Axe (inaccessible)- Combination Axe (inaccessible)