Way of the Iron Fortress

Fortress Stance

Starting at 3rd level, you learn to harden your resolve and physical form, preparing to withstand and repel attacks. As a bonus action, you can enter Fortress Stance, granting you:

• An increase in AC equal to your half your Wisdom modifier rounded up (minimum of +1), as you fortify your defenses.
• Additional damage on your unarmed strikes equal to your half your Wisdom modifier or Strength modifier rounded up (minimum of +1), channeling your energy into powerful blows
  
  Unarmed Mastery: While in this stance you can only make melee attack using unarmed strikes and you cannot wield a shield or armor.
  This stance lasts for 1 minute or until knocked unconscious. 
  This stance can be used a number of times equal to your Wisdom modifier (minimum of once) per long rest. Additional uses cost 2 Ki points each.

Vigilant Guardian

Starting at 3rd level, your training in the Way of the Iron Fortress has honed your senses to detect potential dangers and threats, even in seemingly peaceful surroundings. You gain proficiency in the Perception skill, reflecting your heightened awareness and keen observation skills.
Additionally, you can spend 10 minutes in meditation to enter a state of heightened vigilance. While in this state, you have advantage on Wisdom (Perception) checks to detect hidden or obscured creatures or objects, as well as to notice details in your environment that others might overlook.

Iron Rebuke

Starting at 6th level, your reflexes sharpen, allowing you to swiftly counter when struck. When you are hit by a melee attack, you can use your reaction to make an unarmed strike against the attacker. If this strike hits, you can:

• Damage Mitigation: Reduce the damage from the incoming attack by the amount of damage dealt by your unarmed strike.
• Energy Channeling: Forego reducing the damage to instead regain 1 Ki point.
  Additionally, you may spend 1 Ki point to push the attacker 10 feet away or knock them prone, controlling the space around you.

Iron Bulwark

Starting at 11th level, your mastery over kinetic energy deepens, enhancing your mobility and tactical strikes. While in Fortress Stance:

• Unstoppable Momentum: Once per turn, you can move up to half your speed as a free action, this movement does not provoke opportunity attacks.
• Storm the Fortress: If this movement is towards an enemy, the next attack you make against them before the end of your turn deals additional force damage equal to half the number of feet moved, capped at half your monk level, rounded down.

Impenetrable Fortress

Starting at 17th level, you become a true fortress on the battlefield, a bastion of unmatched power and resilience. Enhance your Fortress Stance with the following capabilities:

• Walls of the Fortress (2 Ki points): When you activate Fortress stance, You create 20-foot aura that grants you and your allies resistance to damage from enemy attacks while within the aura.
• Wrath of the Fortress (1 Ki point per use): Use your reaction when hit by a melee attack to release part of the absorbed damage back at the attacker as force damage, equaling half the damage you absorbed since your last turn.
• Ultimate Counter (3 Ki points): Use your reaction to gain the ability to reflect any attack that hits you back at the attacker, causing them to suffer the attack's effects instead of you. This effect can only trigger once per use of Fortress Stance.