Way of the Tempestuous Soul

Monks of the Way of the Tempestuous Soul learn to channel their life energy into searing bolts of lightning. They teach that meditation can unlock the ability to harness the vast stores of energy within all creatures. Upon mastery of the meditation and collection of energy, students are encouraged to go out and explore the world in order to adapt and grow. Fledgling monks are shown what the some applications of these energies are but must master them and make the skills their own alone.

Blitzkrieg Strike

Starting when you choose this tradition at 3rd level, you can hurl searing bolts of magical lightning.

You gain a new attack option that you can use with the Attack action. This special attack is a ranged spell attack with a range of 30 feet. You are proficient with it, and you add your Dexterity modifier to its attack and damage rolls. Its damage is lightning, and its damage die is a d4. This die changes as you gain monk levels, as shown in the Martial Arts column of the Monk table.

When you take the Attack action on your turn and use this special attack as part of it, you can spend 1 ki point to make the special attack twice as a bonus action.

When you gain the Extra Attack feature, this special attack can be used for any of the attacks you make as part of the Attack action.

Flash Step

At 6th level, you gain the ability to briefly become lightning itself. As a bonus action you can teleport up to 60 feet to an unoccupied space you can see. You then have advantage on the first melee or ranged attack you make before the end of the turn. You may do this a number of times equal to your proficiency bonus. You may also spend 1 ki point for each use of this ability exceeding your proficiency bonus. All expended uses are reset after a short rest.

Storm Guide

At 6th level, you gain the ability to subtly control the weather around you.

You gain resistance to thunder and lightning damage.

If it is raining, you can use an action to cause the rain to stop falling in a 20-foot-radius sphere centered on you. You can end this effect as a bonus action.

If it is windy, you can use a bonus action each round to choose the direction that the wind blows in a 100-foot-radius sphere centered on you. The wind blows in that direction until the end of your next turn. This feature doesn’t alter the speed of the wind.

Unleashed Lightning

At 11th level, you gain the ability to intensify your blitzkreig strike. As an action, you create a bolt of lightning that arcs toward a target of your choice that you can see within range. Three bolts then leap from that target to as many as three other targets, each of which must be within 30 feet of the first target. A target can be a creature or an object and can be targeted by only one of the bolts.

A target must make a Dexterity saving throw. The target takes 10d8 lightning damage on a failed save, or half as much damage on a successful one.

Use of this ability renders its user stunned for 12 seconds. 

One with the Tempest

At 17th level, you gain immunity to lightning and thunder damage.

You also gain a magical flying speed equal to your movement speed. As an action, you can reduce your flying speed to 30 feet for 1 hour and choose a number of creatures within 30 feet of you equal to 3 + your Wisdom modifier. The chosen creatures gain a magical flying speed of 30 feet for 1 hour. Once you reduce your flying speed in this way, you can’t do so again until you finish a short or long rest.