Unarmed Master

You learn a bit of martial training from a Monastic Temple. You gain the following benefits:

• Increase your Strength, Dexterity or Wisdom score by 1, to a maximum of 20.
• If you aren’t wielding any weapons or a shield, once on each of your turns when you attack with a unarmed strike using the Attack action, you can make one additional unarmed strike attack as part of the same action.
• You can make unarmed strikes as opportunity attacks and when you make an opportunity attack with a unarmed strike, you can make an additional attack as part of that reaction. If you possess the Extra Attack feature; where you can attack three or four times; you can make those number of attacks instead.