Through study of the flow of ki and vigorous training, you have learnt how to manipulate your ki to increase your power beyond it's current limit.

• Increase an ability score by 1, up to a maximum of 20
• When you reach level 17, you gain "Sunshield +". Choose 1 effect once per long rest:                                                (A) When a creature is within 5 ft of you for the first time or at the beginning of it's turn, you can use 2 ki points. The creature makes a CON saving throw, taking 5 + 2d8 radiant damage for 3 turns on a failure, or half the damage for 1 turn on a success.                                           (B) When you are attacked by a creature with a melee attack, you can use 1 ki and your reaction to inflict 5 + 1d10 radiant damage to the creature. You can then use 1 of you're "Stunning Strike" feature without using up 1 ki point
• When you reach level 17, you gain "Radiant Sunbolt +". The attack bonus to your "Radiant Sunbolt" increases by 2, and the damage delt increases to ["monk die" + STR/DEX modifier + half your proficiency bonus (rounded down)]. You can use 1 ki point to attack with "Radiant Sunbolt +" twice after using a "Searing Sunburst" attack.
• When you reach level 17, you gain "Searing Sunburst: Overcharge". You can increase the amount of ki points you can use for your "Searing Sunburst" feature by an additional 5 ki points, but for each addition ki point used, you gain a level of exhaustion, and become fatigued by "no. of additional ki points used" minutes, reducing your speed to 5, unable to take any actions during combat, and automatically fail STR and DEX based saving throws or ability checks.
• When you reach level 17, you gain "Ability Overcharge". You can spend 3 ki points to active this feature at level 17, with this cost decreasing by 1 for each level above 17. When activated, you cast"Haste"  (you have to spend 3 ki points to use the "addition action" feature of this spell), "Warding Bond"  on youself, "Fly"  on yourself, and "Darkvision". You also deal and additional 1d8 force damage with your unarmed strikes from level 17, which is increased to 2d8 from level 19. You can also use 1 ki point and an action to cast "Scorching Ray" or "Mirror Image"  or use 2 ki points to cast "Fireball", all treated as if casted as 3rd level spells. All of these spells casted and damage increases last for 3 rounds from the time you activated "Ability Overcharge", with you sustaining a round of fatigue due to the "Haste" spell's effect.
• You can use 4 ki points at level 17 to increase the duration of "Ability Overcharge" by an additional round, with the ki cost to increase the feature's duration decreasing by 1 ki point for each level above level 17. The duration of fatigue caused by the "Haste" spell casted through "Ability Overcharge" increases by a number of rounds equal to the amount of ki points spent to increase the duration of "Ability Overcharge" (e.g. if 8 ki points total are spent at level 17 to increase the duration, the number of rounds of fatigue after "Ability Overcharge" ends will be extended by an additional 8 rounds).