The Ten Ancients of Di are the one of the first group of Monks to manipulate Ki into something more valuable. By grouping Divination magic and the power of the Monk's Ki, Di was created.
Monks who follow the Way of The Di hone to master their inner peace and spend years to create magic with it. The Ten Ancients who follow The Way of The Di have surrounded their bodies with Di essence and are in a constant state of inner peace, many Monks who follow the same path often do so to reach the same level of awesomeness that The Ten Ancients have achieved.

The infamous Drow, Drizzt Do'Urden once approached The Ten Ancients for advice on finding his inner peace and for ten whole years Drizzt practiced with The Ten Ancient Tortle known as Master Loogwei, and soon enough Drizzt could harness his inner peace to become a strength that would give him the abilities he needed to defend himself. This event leaded to many Monks changing from Ki to Di and many Monks finding the absolute awesomeness that is their inner peace.

Inner Peace

Starting at 3rd level, you begin to search for your inner peace. While on the path to Inner Peace you begin to find reasons for life's harsh lessons and begin using them as ways of learning and guidance to the outcome of your future and other's. While on this winding path you begin to find magic within your Ki as it grants you insight on where to go in your life, your slowly transforming Ki gives you a range of benefits.

• You learn the spell Guidance and can cast it with your WIS as your Spellcasting Ability
• You learn the spell True Strike and can cast it with your WIS as your Spellcasting Ability
• After a long rest or once during a short rest you may meditate for 2 hours to prepare any Divination Spell which has a level equal to half your Monk Level (rounded down) The number of prepared spells you can learn increase by (3 prepared spells at level 6, 6 prepared spells at level 11, 9 prepared spells at level 17)

Zen Ball

At 6th level, you now understand what it means to have Inner Peace and now you just need to achieve it, by harnessing all the inner peace you have managed to grasp so far you are able to do an awesome thing with it.
By spending a Ki Di point before using Deflect Missile to go in a stance of Inner Peace where you focus all your energy on your Inner Peace, after an awesome stance you're able to grasp the projectile and immediately reduce the damage to 0 no matter the size of the projectile. By collecting all your Di Essence before using Deflect Missile you're able use a ranged attack with it without using a Ki Di point.
The attack automatically hits and you can spend another Ki Di point to make it a critical hit, the damage you add to the projectile is your Proficiency Bonus + Monk Level + WIS Modifier.

You can't use this feature again until a Long Rest or by spending a Ki Di point during a short rest.

Tenacious Di

Beginning at 11th level, all of your Ki points have now gone through the process of becoming Di points. You are now on your way to finding true Inner Peace, but before that you focus on growing the power of your Di. 

• Road to Inner Peace: You can now expend a Di point to cast one of your Divination Spells you've learned through Inner Peace, if you do this you add your Di Save DC if the spell uses one.
• Fists of Fury: Flurry of Blows now deals an extra 2d6 + Monk Level + Proficiency Bonus + WIS Modifier Radiant damage when spending more Di Points after the 1st.
• Tranquil Di: By spending a Di point during an action, you can regain hit points equal to three times your monk level, you can't use this feature again after a long rest.

Also after meditating you harness the recovered Di as a green energy will flow around you. Your eyes begin to glow green and yellow and the same energy appears in your palms, you also appear 2ft taller.

Master of Inner Peace

At 17th level, you have studied the arts of Inner Peace and now have achieved greater Inner Peace. You are able to use your Inner Peace to become one with the elements, the people and life itself. Transcending above common understand and touching peak awesomeness you are able to reach a form of pure Inner Peace.

• As a bonus action you take on a form of pure Inner Peace, casting Sanctuary on yourself and giving you 1d100 + WIS Modifier + Proficiency Bonus + 8 of temporary hit points.

• Any attack you do now deals an extra 1d6 + Monk Level + WIS Modifier + Proficiency Bonus of Radiant Damage and an extra 2 Awesome Damage.

• Every time you hit a creature in this form and they are below their hit point maximum you regain 1 Di point, every time you gain a Di point in this form you become more within Inner Peace and refresh a use of Tranquil Di.

You also take upon an appearance of pure Inner Peace of your spirit animal, most Ancient Di's are representing of a dragon but some follow towards turtles, foxes and pandas. Whatever the form you take, this spirit will remain with you forever to remind you of what Inner Peace means to you.

“One often meets his destiny on the road he takes to avoid it.” - A very wise Tortle