Your study of transmutation magic allows you to stretch your body far beyond its usual limits in order to gain an advantage.

Arm Growth

Starting when you choose this tradition at 3rd level, you can tap into your ki to bend your body past its usual limits

As a bonus action, you can sprout an additional arm granting you certain advantages.

• You may use wisdom instead of strength for strength ability checks and saving throws.
• When you use Flury of blows you may make an additional unarmed strike attack as part of the same bonus action.
• you may wield three weapons at a time or two weapons at a time and still have a free hand. 

The additional arm lasts 10 minutes or until you end it as a bonus action. 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 2 ki points to use this feature again. You may have multiple uses of arm growth active at one time.

At higher levels 

At 3rd Level all weapons that you are proficient with count as monk weapons for you while a use of Arm Growth is active including heavy and two-handed weapons and weapons with the special property.

At 6th level, When you have multiple uses of Arm Growth active at one time, you may add your wisdom modifier an addition time to strength ability checks and saving thrown for each arm beyond the first.

At 11th level when you use Flury of Blows you may make an additional unarmed strike attack as part of the same bonus action for each use of Arm Growth you have active.

Contortion

Beginning at 3rd level, you can compress your body to fill only a space two size categories smaller than normal while squeezing.  You can fit through a gap as narrow as 2 feet or 1 foot while squeezing if you have ample space to do so. 

Ki Shifting

Beginning at the 6th level, you tap into your ki in order to change your physical form. You can spend 1 ki point to cast the following spell requiring no material components and having only yourself as the target. Wisdom is your spellcasting ability.

• Jump
• Longstrider
• Alter Self
• Enlarge/Reduce
• Enhance Ability
• Spider Climb

Ki Shifting (improved)

At 11th level, your ki-empowered shifting abilities reach new heights. The spells you cast require no material components and can only have you as a target. 

• You can spend your action and 1 ki points to take on the appearance of an inanimate object. While you remain motionless a successful Wisdom (perception) or Wisdom (Investigation) check against you ki save DC can see through your guise. This new form must be of the same size category as you.
• You can spend 2 ki points to cast Fly. You grow wings and their appearance can be whatever you choose. 
• You can spend 3 ki points to cast Polymorph.

Ki Shifting (Final)

At 17th level, you have achieved the truest form of shape-shifting. You can cast the following spells requiring no material components and having only yourself as the target.

• You can spend 5 ki points to cast Heal.
• You can spend 6 ki points to cast Regenerate.
• You can spend 7 ki points to cast True Polymorph.
• You can spend 8 ki points to cast Shapechange.