Homebrew Monk Subclass

Way of the Broken Sky

Monks of the Way of the Broken Sky respect the unbridled energies that lay dormant within the sky, and the pure power a storm wields as it crosses the land. These monks live and practice their martial arts high above the world, cloistered away in mountain temples. They train their bodies and minds with absolute focus in an attempt to understand, and even control, the chaotic forces of the sky itself.

Step of the Broken Sky

When you choose this tradition at 3rd level, you can tap into the raw energies of the wind as you move around the battlefield. Whenever you use your Step of the Wind to Dash, you can choose to apply one of the following effects:

The first time you hit with a melee weapon attack before the end of the turn, your attack rings with thunder that is audible within 100 feet of you, and the attack deals extra thunder damage to the target equal to your Martial Arts die.

You have advantage on the first melee weapon attack you make before the end of the turn. The melee attack deals lightning damage instead of its normal type.

You do not gain any extra movement speed from the dash granted by Step of the Wind, and instead gain a flight speed equal to your movement speed until the end of your turn

Fist of Roaring Thunder

At 6th level, you gain the ability to channel your ki into a powerful blow that shatters the air itself. Immediately after you take the attack action on your turn, you can spend 2 ki points to cast the 1st-level spell thunderwave as a bonus action.

You can spend additional ki points to cast thunderwave as a higher level spell. Each additional ki point you spend increases the spell’s level by 1. The maximum number of ki points (2 plus any additional points) that you can spend equals half your monk level (round down).

Soul of the Storm

At 11th level, you gain the ability to channel your ki and empower yourself with the might of the storm. As a bonus action, you can expend up to 3 ki points to grant your melee weapon attacks a bonus to damage rolls when you hit with them. The bonus equals the number of ki points you spent. This bonus last for 1 minute or until you use this feature again. While under the effect of this feature, you also gain resistance to lightning and thunder damage.

Fury of the Broken Sky

At 17th level, you gain the ability to channel your ki and let loose a bolt of lightning. As an action, you can spend 3 ki points to unleash a line of lightning that is 60 feet long and 5 feet wide. Each creature in the line must make a Dexterity saving throw, taking 6d6 lightning damage on a failed save, or half as much damage on a successful one. You can then teleport to an unoccupied space touched by the line.

You can increase the bolt's damage by spending ki points. Each point you spend increases the damage by 1d6.

Art Credit - Jason A. Engle Student of Ojutai - Dragons of Tarkir