Throwing proficiency

You have achieved a deft hand and a quick wrist in combat, granting you the following benefits:

• Increase your Strength or Dexterity by 1, to a maximum of 20.
• Once per turn, when you hit a creature with an attack that is made by a thrown weapon, you can reroll one of the attack’s damage dice if the result is a 1 or 2, and you must use the new roll.
• When you score a critical hit with a thrown weapon, you can roll one additional damage die when determining the extra piercing damage the target takes.
• When you make an attack with a thrown weapon you may add your proficiency modifier to the attack roll
• If an enemy passes within the base range of your thrown weapon you may take a reaction to make an attack of opportunity.