Way of Iron

Way of Iron.

Iron Skin, Steel Bones

You can use your Strength modifier, instead of Dexterity, when calculating your AC using Unarmoured Defence.

Additionally, you can give yourself a bonus to your initiative rolls equal to your Strength modifier.

Brace

Due to intense physical training, you learn how to endure tremendous amounts of pain. As a reaction, you grit your teeth and tense your muscles. Until the start of your next turn, you gain resistance to all damage and cannot forcefully be moved or knocked prone. You can use this feature a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest. While you have no uses available, you can spend 1 ki point to use this feature again.

Spar

As an action, you slam your fists together creating a small sonic pulse, drawing the attention of nearby enemies. Any hostile creatures within 30ft of you must make a Wisdom saving throw against your Ki Save DC, on a failed save they are goaded for 1 minute. Goaded creatures have disadvantage on all attack rolls against targets other than you. If a creature succeeds their save, they are immune to this feature for 24 hours. You can use this feature once, and you regain its use when you finish a short or long rest. While you have no uses available, you can spend 3 ki point to use this feature again.

Resolute Strength

When you make a Strength check, you can spend 1 ki point and add a roll of your martial arts die to the total. This feature must be used before knowing the outcome of the roll.

Unbreakable Will

When you are reduced to 0 Hit Points you no longer fall unconscious, instead you push through the pain and fatigue. You no longer make death saves, instead taking damage causes your current hit points to go into the negative. If your current negative hit points equal your hit point maximum you die, any healing will deduct from your hit point deficit and bring you towards positive hit points. While your hit points are in the negative, you can move and act like normal but you are vulnerable to all damage. While in this state, the damage vulnerability cannot be negated by any effect other than the Brace feature. The effects of this feature end if you have at least 1 hit point, or if you outright die.