Puncture Flesh 
Trigger Your last action was to deal piercing damage to an enemy within your reach
Effect Attempt an Athletics check to [/act grapple] the same enemy. The weapon that dealt the triggering damage gains the grapple trait for this check. On a success, the target also takes 1d8 persistent,piercing damage (or 2d8 persistent,piercing damage on a critical success). When the target is no longer Grabbed or Restrained by you, the persistent damage ends.