Path of the Mighty Fist

Barbarians who take the path of the Furious Fist are often compared to Monks in their abilities, but the underlying philosophies are worlds apart. While monks tend towards quiet contemplation and careful mediation to master their ki and thus their bodies, Barbarians instead use their anger to ignore the usual physical limits. They hit harder than a mortal being should be able to hit, and push their muscles to their limits to pull their enemies into the dirt.

Iron Fists

Starting when you choose this subclass at 3rd level, your unarmed strikes grow stronger. Your unarmed strike uses a d4 for damage.

While raging, your unarmed strike uses a d6 for damage, and whenever you take the Attack action on your turn to make an unarmed strike or make an Athletics check to grapple, trip, or shove, you may make an additional unarmed strike as a bonus action.

Additionally, you gain proficiency in Athletics. If you are already proficient in Athletics, you gain Expertise in Athletics

Crushing Grip

Starting at 6th level, whenever you successfully grapple, shove or trip a creature while raging, you deal bludgeoning damage to that creature equal to your Strength modifier plus your bonus Rage Damage. A creature that is grappled by you at the start of each of your turns takes this damage again.

You also gain the following benefits

• Your unarmed strikes count as magical for the purpose of overcoming resistances and immunities.
• You can use your action to try to pin a creature grappled by you. To do so, make another grapple check. If you succeed, you and the creature are both restrained until the grapple ends.

Mighty Stance

Starting at 10th level, the damage die for your unarmed strike increases to a d8 while raging.

While raging, you are also is treated as one size larger than your actual size when attempting a grapple, shove or trip and can move at your full movement speed while grappling creatures no larger than one size larger than you.

Additionally, creatures have advantage on melee attacks against creatures you are grappling.

Titanic Fury

Starting at 14th level, while you Rage your size increases by one step.
You also gain the following benefits:

• The damage die for your unarmed strikes increases to 2d6 while raging
• Attacks you make against structures deal double damage.
• Your unarmed strikes now deal force damage, rather than bludgeoning

While raging, you have resistance to all damage from creatures you are grappling, and advantage on saving throws against creatures you are grappling.