Radiant Sun Bolt

Starting when you choose this tradition at 3rd level, your fists are imbued with magical radiance that you can hurl at your foes.

You can choose to deal radiant damage with your unarmed strikes. Additionally, whenever you would make an unarmed strike, you can choose to make a special ranged spell attack instead. This special attack has a range of 30 feet and deals damage equal to your Martial Arts die. You are proficient with the attack, and you can add either your Dexterity or your Wisdom modifier to the attack and damage rolls you make with it.

Using this attack counts as if you made an unarmed strike for the purposes of your Martial Arts feature.

Touch of Sun's Warmth

Starting at 6th level, you can impart the life-giving energy of the sun through your touch, mending wounds and cleansing the body. You have a pool of magical healing power that replenishes when you take a short or long rest. With that pool, you can restore a total number of hit points equal to twice your monk level.

As an action, you can touch a creature and draw power from the pool to restore a number of hit points to that creature, up to the maximum amount remaining in the pool.

Instead of healing the creature, you can expend 4 hit points from your pool of healing to cure the target of one disease or neutralize one poison affecting it. You can cure multiple diseases and neutralize multiple poisons with a single use of Touch of Sun's Warmth, expending hit points separately for each one.

When you use your Flurry of Blows, you can replace one of the unarmed strikes with a use of this feature.

This feature has no effect on undead and constructs.

Searing Sunburst

At 11th level, as an action, you magically emit a glowing radiant light that erupts into a brilliant sphere for a brief but deadly instant.

Each creature in a 20-foot-radius centered on you must make a Constitution saving throw, taking radiant damage equal to 2d6 + your Wisdom modifier on a failed save, or half as much damage on a successful one. A creature doesn't need to make the save if the creature is behind total cover that is opaque.

You can increase the sphere's damage by spending ki points. Each point spent, up to a maximum of 3, increases the damage by 2d6.

Nova Shield

At 17th level, you become wreathed in a luminous, magical aura. You shed bright light in a 30-foot radius and dim light for an additional 30 feet. This light is sunlight. You can extinguish or restore the light as a bonus action.

Also, if a creature hits you with an attack while you are in sunlight, you can use your reaction to blind it with a flash of light. The creature must succeed on a Constitution saving throw against your Ki save DC or take radiant damage equal to 5 + half of your monk level and be blinded until the start of its next turn.