Lethal Ranger (5e Feat)
From D&D Wiki
- Increase your Strength or Dexterity score by +1.
- When you score a critical hit with any bow weapon attack, you can roll the weapon’s damage dice one additional time and add it to the extra damage of the critical hit.
- You weapon attacks score a critical hit on a roll of 19 or 20. If it is already 19 or 20, then it is 18 or 19 or 20.