A weapon charm commonly used by mercenaries in the Crossroads and beyond. As an action, you may attach a weapon charm to a weapon of your choice that meets its prerequisites, conferring unique properties. You may detach a weapon charm and reattach it to a new weapon as part of the same action. A weapon may benefit from only one weapon charm at a time. 

Prerequisite: Heavy, Reach, or Versatile Property

If you hit a creature with this weapon, you can force the creature to make a Constitution saving throw with a DC equal to 8 + your Proficiency Bonus + the ability modifier you used to make the attack roll. On a failed save, the creature has the Prone condition.