Ruthless Double Strike

Prerequisites: Must be lvl 15+, Must have a double bladed weapon that you are proficient with as your primary weapon

After extensive training, you've learned the mastery of using both sides of a double bladed weapon to your advantage. When striking an enemy and landing a critical hit, you can conserve that energy and forward it into your next attack.

 Upon hitting a successful critical with a double bladed weapon that you are proficient with:

• Your next attack roll will have advantage
• Your next attack roll will have an additional critical range of 1 (19-20) (18-20) (17-20)
• Until the end of your next turn, and before you make a melee attack with a double bladed weapon that you are proficient with, you can choose to take a -5 penalty to the attack roll. If the attack hits, you add +10 to the attack's damage

Rules of this feat: The Ruthless Double Strike does not give any extra attacks per action. The advantage and extra critical range must be used on the very next attack of the same double bladed weapon you are wielding, and can only be triggered once per turn but may carry over into the first attack of your next turn. If you hit a successful critical and subtract from your attack roll, your critical hit and added damage bonus still stand.