Knockout Attack

Information:
While attacking with this weapon you can spend a bonus action which would be applied to two attacks and declare that you are attempting a knockout attack, this would make both of these attacks roll at disadvantage. If the attack would be rolled at disadvantage, the attack automatically misses. If the attacks hit the target, the takes half damage from the attacks and must succeed on a constitution saving throw against the wielder's Dc (8+proficiency + Str/Dex ) or be knocked unconscious and fall prone. The target can repeat the saving throw at the end of each of their turns to wake up. The target also wakes up if they take any damage or a creature takes an action to shake them awake. If this attack reduces a creature to 0 hit points they fall unconscious but stable.​