Impaler

Increase your Strength or Dexterity by 1, to a maximum of 20.

Once per turn, when you score a critical hit with a melee weapon that deals piercing damage to a creature that is no more than 1 size larger than you, you can impale them. Impaling the creature causes the Grappled condition and Disadvantage on Attack Rolls towards any creature for as long as the creature is impaled and you are still holding on to the weapon. As a reaction on your turn, you can wrench the weapon out dealing another roll of your weapon's damage. The creature can take an action on their turn to wrench the weapon out themselves as a Strength check vs. your Strength or Dexterity check. If the creature is successful, they take half of the roll of the weapon's damage.

If you hit for the maximum damage on one of your weapon's damage die, you can gore the creature. For 1 minute, or until the creature or creature's ally succeeds on a DC 15 Medicine check to mend the wound, the creature takes a quarter of the damage it receives for that round as force damage at the end of its turn. This creature is not affected by this if it is an Undead or Construct.

If you have the Piercer Feat, you can roll one more additional damage die when you score a critical hit with piercing damage.