Monks that choose the Way of the Ungodly Bones have learned to contort their bodies in the most bizarre ways, turning themselves into living Weapons.

Knuckle Knives

At 3rd level you have learned to make you Unarmed strikes deadlier. As a bonus action, you can make your knuckle bones stick out of your hand. You choose whether the bones are round and have a big surface area or sharp and look more like claws. If you choose the round bones, your unarmed strikes deal +1 bludgeoning damage on a hit. If you choose the sharp bones, your unarmed strikes deal piercing damage instead of bludgeoning damage on a hit and deal +1 piercing damage. The damage for both of these options increases to +2 at 10th level. You can use a bonus action to retract these bones.

Versatile Bones

At 3rd level, because of your rigorous training, you can twist your bones in unnatural ways, letting squeeze into spaces meant for creatures up to one size smaller than you. Additionally, your bones have become so rigid that has become hard for any enemy to break them. If a creature tries to break any of your bones in any form (for example beheading you or chopping a limb off) they have to pass a strength check equal to your Ki Save DC. If they succeed, they are able to complete their action, if they fail, you take half damage from their attack and they are unable to break your bone.

Increased regeneration

At 6th level, your body has become used to being used in abnormal ways and has sped up you regeneration process. You can spend 1 ki point to use your bonus action to regain hit points equal to your wisdom modifier + your monk level.

Living Weapon

At 11th level, your body is able to regenerate at incredible speeds. This allows you to rip your own bones and use them as weapons. As a bonus action you can spend 2 ki points to rip out either your spine or your shin bone. These bones then immediately regrow. The bones disappear if you use this feature again.

Spine

You can use your spine as a monk weapon that your are proficient with. It counts as a whip that deals 2d6 slashing damage. This damage counts as magical for the purpose of overcoming resistances. If you hit a creature with the whip, you can use your bonus action to pull the creature up to 10 feet closer to you.

Shin

You stick your shin bone into your wrist, creating a lethal weapon. Your unarmed strikes deal and extra 1d4 piercing damage on a hit. Additionally, you can use your bonus action when you hit a creature with an unarmed strike while the shin bone is in your wrist to break the bone off, leaving it in their body. They take 2d4 piercing damage at the start of each of their turns if they do not remove it. It costs an action to remove. Once you break the bone off, your unarmed strikes go back to dealing their normal damage and you can't use the Living Weapon feature for 1d8 rounds.

 

Ungodly Armor

At 17th level you have gained complete mastery over your bones. You can spend 4 ki points and a bonus action to make all your bones stick out of your body. If you use this feature right after attacking someone with an unarmed strike, regardless of whether you hit or not, they take 2d8 piercing damage. This damage counts as magical for the purpose of overcoming resistances. Additionally, your AC increases by 3 and everyone who attacks you with a melee attack takes piercing damage equal to 2 rolls of your martial arts die. This damage also counts as magical for the purpose of overcoming resistances. This lasts for 10 minutes.