You have spent time focusing the force of your will through your fist, as a result, you gain the following benefits.

• Your unarmed attacks become magical for the purposes of bypassing resistances, and you may add your Charisma modifier to attack and damage rolls made using them. Also, your unarmed attacks now use 1d4. 
• When you make an attack with one hand, you may make a Charismatic Strike as a bonus action. You may use your Charisma modifier for attack rolls made in this way.
• You are proficient with unarmed attacks.