Piercer

Source: Tasha's Cauldron of Everything

You gain the following benefits.

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

Puncture.
Once per turn, when you hit a creature with an attack that deals Piercing damage, you can reroll one of the attack’s damage dice, and you must use the new roll.

Enhanced Critical.
When you score a Critical Hit that deals Piercing damage to a creature, you can roll one additional damage die when determining the extra Piercing damage the target takes.