Iron Bone Training

Week 1: Hardening the Bones

• Bone Density I: Add +1 bludgeoning damage to all unarmed strikes due to the increased density of your bones.
• Resilient Frame I: Gain a +1 bonus to Constitution saving throws to resist being knocked prone or stunned.
• Pain Tolerance I: Gain 3 temporary hit points after a long rest, representing initial physical hardening.

Week 2: Strengthening Resistance

• Bone Density II: Increase additional bludgeoning damage to 1d4 for all unarmed strikes.
• Resilient Frame II: Increase your Constitution saving throw bonus to +2 against effects that would knock you prone or stun you.
• Pain Tolerance II: Increase temporary hit points after a long rest to 5.

Week 3: Shock Absorption Training

• Shock Absorption I: Once per long rest, you can reduce incoming bludgeoning damage by an amount equal to your Constitution modifier.
• Bone Conditioning I: Gain resistance to non-magical bludgeoning damage for 1 minute, once per long rest.
• Pain Tolerance III: Increase temporary hit points after a long rest to 7.

Week 4: Increased Durability

• Bone Density III: Increase additional bludgeoning damage on all unarmed strikes to 1d6.
• Resilient Frame III: Gain advantage on Constitution saving throws against effects that would knock you prone or stun you.
• Pain Tolerance IV: Increase temporary hit points after a long rest to 10.

Week 5: Iron Structure

• Shock Absorption II: Once per short rest, you may use Shock Absorption to reduce incoming bludgeoning damage by an amount equal to your Constitution modifier + proficiency bonus.
• Bone Conditioning II: Gain resistance to non-magical bludgeoning damage for 5 minutes, once per long rest.
• Pain Tolerance V: Increase temporary hit points after a long rest to 12.

Week 6: Advanced Power and Defense

• Bone Density IV: Increase additional bludgeoning damage on all unarmed strikes to 1d8.
• Shock Absorption Mastery: Use Shock Absorption once per encounter, reducing bludgeoning damage by an amount equal to your Constitution modifier + proficiency bonus.
• Pain Tolerance VI: Increase temporary hit points after a long rest to 15.

Week 7: Iron Bone Mastery

• Iron Fists: Your unarmed strikes are so powerful they now count as magical for overcoming resistances.
• Unbreakable Structure: You gain permanent resistance to non-magical bludgeoning damage.
• Perfected Shock Absorption: Use Shock Absorption once per encounter, reducing any type of physical damage (bludgeoning, piercing, or slashing) by your Constitution modifier + proficiency bonus.
• Pain Tolerance Mastery: Increase temporary hit points after a long rest to 20.

This scaled Iron Bone Training progression enhances both offense and defense as the character’s bones harden, allowing them to deal additional damage with every unarmed strike while gradually building resistance to physical damage. By the end of this training, the character embodies a true “iron-boned” warrior, able to withstand intense physical punishment and deliver powerful, bone-breaking strikes.