The Way of the One Punch opens the possibility to finish enemies with one punch, giving you power with an exchange of taking your humanity. Although you will possibly be the most overpowered being in the planes, you will not be able to feel like a human anymore. Some take the path of evil, getting consumed of their power and using it to do evil deeds. Getting consumed by the Way of One Punch is harder than not, and this Way is the ultimate test of good or bad towards monk. 

The Punch

Whenever you punch an enemy, they get pushed 30 ft. away (no stacking), and when you use Flurry of Blows they get pushed 60 ft. away and fall prone. 

Body of Steel

At 6th level you have a Body of Steel, immune to poison, necrotic, stunning, and petrifying conditions. 

Revolutionary Power

If it isn't, your Strength and Dexterity scores automatically become 20. You also gain 10 + your monk level temporary hit points after every rest. If you still have your temporary hit points during your next rest, you only regain your lost hit points from your last rest (e.g. if you regained 21 hit points on your last rest and lost some, your next rest resets it to 21 temporary hit points.)

Massive Strength

At 17th level, you gain massive strength. Any unarmed attacks push enemies 50 ft. away from you, and you are proficient in Intimidation, doubling the Intimidation score if you are already proficient.

You also gain Strength die. You have Strength die equal to your strength modifier, and they all are d20s. You can use up to 3 Strength die to add to your unarmed attack damage, and you regain them after a rest. If an enemy does not die from one of your punches, they are petrified by your massive strength.