Warrior of justice and hope

You have been chosen to fight for the weak, defend against evil, and safeguard the world's peace.
This duty has been placed on you by a magical being of some kind, perhaps a guardian spirit or deity. Regardless, your goal remains the same!

Transformation

When you select this class at third level you gain the ability to transform, this grants you use of the abilities in this subclass.
You can transform a number of times equal to your proficiency bonus for 1 minute, this can be done as a bonus action.

Cantrips

When you transform you gain access to cantrips. You can choose these cantrips from all spell list, and can switch them out on a level up.
You know a number of cantrips equal to 1+1/3 your fighter level
Your saving throws=8+constitution+proficiency bonus

 

Call of justice

When you transform you let out a battle cry or say a short catchphrase like incantation, and thanks to your magical powers you can inspire your allies. Whenever you transform your allies gain immunity to fear and temporary hp equal to 5+your proficiency bonus for 1d4+your constitution stat rounds.

Willful weapon

Willful weapon
7th level
Your will power has begun to take on a physical form. When transformed you can, as a free action, summon a weapon you have marked as your willful weapon. Any weapon you had will either become the weapon(if you are holding it)or be shunted into the storage space you were keeping your willful weapon. You may have only one at a time, unless the weapons are two of the same weapons that you can dual weild. You can mark a weapon during a short rest.
The willful weapon gains the following benefits:
Magic: the weapon acts as a Spell casting focus, and if it wasn't already becomes a magical weapon for the purpose of overcoming resistances.
Magical strike: when you attack with this weapon, you may cast a cantrip as one of your attacks after it.
Guiding light: the weapon can shed a bright light up to 5×your fighter level of feet, this can be adjusted as a free action. Additionally, the damage type becomes radiant.

Imbued strike

Your willful weapon is starting to become more like a second arm, allowing you to use it to cast Spells more effectively. When you attack with your willful weapon, you may imbue it with a cantrip that does not require concentration. When you do this, if the weapon hits, you cast the cantrip on the target as well as part of the attack. You may do this once per action, including as a bonus action or with action surge.

Finishing move

You've become skilled enough in your control of your powers to preform a powerful attack, which will hopefully end the enemy because it's going to drain a lot of power.

Once per short rest while transformed you may deal 10d10 radiant damage on an attack with your willful weapon, the use is only used on a successful hit. If the attack does not drop the enemy to 0 hp, you will drop out of transformation early.

At level 17, this becomes 10d12.

Ultimate form

You have achieved the pinnacle of power as a champion of justice. You may transform infinitely and learn 6 new cantrips. Additionally when you are transformed you may transform again for a free action into your Ultimate form. While in your Ultimate form you add your constitution to your cantrip saves(again in this case), cantrip attacks, cantrip damage, attack rolls, damage rolls, and gain a flying speed equal to your walking speed. In Ultimate form your finishing move damage becomes 30d8.

You remain in Ultimate form for ten minutes or until knocked unconscious, at the end you gain the effects of one level of exhaustion however do not gain an actual level of exhaustion. This false exhaustion and use of this feature replenish after a long rest.