Way of the Iron Will Few people are born with such an extraordinary willpower that it can be manifested in the physical world. And even fewer are aware of their gift. Such people may seek out guidance in learning to control it, or their abilities could be discovered by another like them. However you found your path, know that it will not be easy.

Iron Soul At 3rd level, you can choose to use your Charisma instead of your Wisdom modifier when calculating the Ki save DC for your monk features.

Iron Body Starting at 3rd level you are able to physically manifest your willpower to make your body as hard as iron. You can use your Charisma instead of your Wisdom modifier when calculating the AC given to you by your Unarmored Defense feature.

Iron Fist Also, starting at 3rd level, you are able to use the manifestation of willpower for offensive purposes aswell. You can spend 1 Ki point to add your Charisma modifier to all damage rolls of your unarmed strikes and monk weapons until the end of this turn.

Iron Will Finally, starting at 3rd level, you are more resistant to manipulations of the mind than a normal man is. You have advantage on saving throws against being charmed or feared.

Gift of Gab At 6th level you gain proficiency in one Charisma based skill. If you are already proficient in the skill you can instead add double your proficiency modifier when making an ability check using the skill. Additionally, starting at 6th level you can spend one Ki point to gain advantage on one Charisma based ability check. You may use this feature after you have seen the result you rolled, but before any of the effects are applied.

Imposing Presence Starting at 11th level, you can impose your will upon others. As an action, you can spend two Ki points to cast the Cause Fear, Charm Person or Command spell without providing material components.