The Radiant Blade

A slight click is the only sound audible in the room, the orc raider didn't see the warrior draw his blade, but he was filled with dread and physical pain as they slowly sheathed it. He looked around as he slowly fell to the floor, of the six raiders he had brought into the building, none had survived the warriors odd attack. He was missing both a arm and leg himself, the warrior slowly moved past them, after all no threats remained, and there were other raiders that need removal from the town.

A fighter who learns the radiant blade fighting style draw out the full power of single handed swords, most practitioners of this style of combat often use it as a spectacle, participating in public duels with other sword masters to prove it's superior strength. While the style is rumored to have six forms, most practitioners only manage to learn one or two, this is most likely due to the fact that each member must alter each form to suit their preferred blade type, drastically increasing the time needed to master each one. Those who manage to overcome the challenges of this style are rumored to have gained amazing powers, including moving to opponents in the blink of an eye, infuse radiant energy into their weapons, and even cause radiant slashes to hit foes at a distance. Most first hand accounts of such swordsmen/swordswomen are often unreliable as they come from unreliable sources. 

Form One - Defensive Draw

3rd-level Radiant Blade Feature

You can Create a zone around you to increase your defense, provided you aren't wearing heavy armor or using a shield

You can use a Bonus action to take a defensive stance for 1 minute. It ends early if you are incapacitated, if you don heavy armor or a shield, or are wielding a weapon with the Two-handed property. You can also leave the stance at any time(No action required).

While your stance is active, you gain the following effects.

• you gain a bonus to your AC equal to your wisdom modifier (minimum of +1)
• your movement speed is reduced by 10ft

You can use this feature a number of times equal to your proficiency bonus, and you regain all expended uses of it when you finish a long rest.

Form One - Radiant Blade

3rd-level Radiant Blade feature

You learn to infuse your melee attacks with radiant power, boosting the damage you do. When you make a melee weapon attack with a weapon that deals slashing damage, and lacks the two-handed property, you deal an additional 1d6 radiant damage.

Form Two - Radiant Flash Strike

7th- level Radiant Blade Feature

You have learned to move short distances in an instant when attacking. When you take the attack action with a melee weapon that deals slashing damage, and lacks the Two-handed property, as part of each attack, you can teleport to an unoccupied space within 15 feet, as long as each attack is made against a different creature.

Form Three - Distant Radiance

10th-level Radiant Blade feature

You learn to use a fast draw attack that strikes a distant foe with a blade of pure radiant energy. 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 30ft. You are proficient with it, and you add your dexterity modifier to its attack and damage rolls. It deals radiant damage, and its damage die is a d6.
When you take the attack action on your turn and use this special attack as part of it, you can make the special attack once 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.

Form Four - Brilliant Surge

15th-level Radiant Blade feature

You have learned to take advantage of your quick draw techniques while moving. When you take the dash action on your turn, you can make one melee weapon attack with a weapon that lacks the two-handed property, if you would pass within melee range(5ft) of a creature. You can only attack up to three creatures in this manner. You can use this ability a number of times equal to your proficiency bonus. You regain all expended uses of this feature on a long rest.

Form Five - Storm of Radiance

18th-level Radiant Blade feature

You have polished your quick draw techniques to their apex, gaining the ability to unleash a wide range, multi-strike attack.
If you are wielding a melee weapon, that deals slashing damage, and lacks the two-handed property, as an action, you can draw you blade, unleashing multiple slashes of radiant energy. Each creature of your choice within a 20ft radius centered on you must make a dexterity saving throw, on a failed save they takes 6d10 radiant damage, and is knocked prone, or half as much on a success and is not knocked prone. You can use this ability one time per short rest.