Homebrew

Traits

Dual Mind. The Sun Blade has Advantage on Wisdom and Charisma saving throws.   Mind Link. The Sun Blade has telepathy with a range of 100 ft. When it's using this trait to speak telepathically to a creature, it can take a Magic action to give that creature the ability to speak telepathically with it for 1 hour or until you take another Magic action to end this effect.   Severed from Dreams. The Sun Blade can’t be the target of the Dream spell.   Spirit of the Sun. Once per Long Rest the Sun Blade can add 2d8 temporary hit points. While they have these hit points they deal an extra 1d8 Radiant damage.   Divine Awareness. The Sun Blade knows if it hears a lie.   Magic Resistance. The Sun Blade has Advantage on saving throws against spells and other magical effects.

Actions

Multi attack. The Sun Blade makes three katana or Blinding Flash attacks.   Solar Katana. Melee weapon attack, 5ft, 1d20+9 , on hit: 2d6+6 Force damage and 4d8 Radiant damage. When the Sun Blade hasn't moved he can make another attack.   Blinding Flash. Ranged spell attack: 600 ft, 1d20+9 . On hit: 6d6 Radiant damage, and the creature must make a Constitution saving throw (DC 20). On failure, it becomes blinded until the end of its next turn.

Bonus Actions

Divine Aid (2/Day). The Sun Blade casts Cure Wounds, Healing Word, Lesser Restoration, or Remove Curse, using Charisma as its Spellcasting ability.

Reactions

Holy Rebuke (2/Day). When the Sun Blade is hit by an attack, it utters a holy word to chastise its attacker. The creature must make a Wisdom saving throw (DC 20 on failure, it takes 2d10 Radiant damage and falls Prone.