Divine Awareness. Ophelia knows if she hears a lie.

Holy Fire. When Ophelia deals fire damage, fiends and undead cannot benefit from resistance or immunity to fire damage.

Immutable Form. Ophelia is immune to any spell or effect that would alter her form.

Innate Spellcasting. Ophelia's spellcasting ability is Charisma (spell save DC 27). She can innately cast the following spells, requiring no material components:

• at will: fireball, spirit guardians, detect evil and good, feather fall, invisibility (self only), searing smite, revivify,  bless
• 3/day: blade barrier, divine word, dispel evil and good, heal, sunburst, holy aura, holy weapon, resurrection
• 1/day: commune, power word heal, mass heal, plane shift, true resurrection
  

Legendary Resistance (5/Day). If Ophelia fails a saving throw, she can choose to succeed instead.

Magic Resistance. Ophelia has advantage on all saving throws against spells and other magical effects.

Sacred Light of Lathander. The area within 30 feet of Ophelia is brightly illuminated with sunlight. Any magical darkness in the area is dispelled and any fiend or undead with in that area is blinded. At the start of Ophelia's turn, each creature of her choice within 30 feet of her takes 4d8 radiant damage.

Sunforged Weapons. Ophelia's weapon attacks are magical. When Ophelia attacks with any weapon, the weapon deals an extra 4d8 fire damage and an extra 4d8 radiant damage.

Multiattack. Ophelia can use her Lightbringer's Presence. She then makes three attacks with her Blazing Sunblade, Flamebearer's Staff or Ray of Sunlight. She then casts a spell or uses her cleansing touch.

Blazing Sunblade. Melee Weapon Attack: +18 to hit, reach 10ft., one target. Hit: 24 (4d6 + 9) bludgeoning damage plus 18 (4d8) fire damage plus 18 (4d8) radiant damage. Each creature within 5 feet of the target also takes 4d8 fire damage.

Flamebearer's Staff. Melee Weapon Attack: +18 to hit, reach 5ft., one target. Hit: 17 (2d6 + 9) bludgeoning damage plus 18 (4d8) fire damage plus 18 (4d8) radiant damage. If the attack hits a fiend or undead of CR 20 or less, it must succeed on a DC 27 Wisdom saving throw or is destroyed instantly, reduced to a pile of ash.

Ray of Sunlight. Ranged Spell Attack: +19 to hit, range 600ft., one target. Hit: 45 (8d8) radiant damage if the target is hostile or 45 (8d8) healing if the target is friendly.

Cleansing Touch.  Ophelia touches another creature. The target magically regains 72 (16d8) hit points and is freed from any curse, disease, poison, blindness, or deafness.

Lightbringer's Presence. Ophelia's radiant appearance and righteous wrath induces fear and awe. Each creature of her choice within 120 feet of her must make a DC 27 Wisdom saving throw or is frightened for one minute.  At the end of each of its turns, a frightened creature can repeat the saving throw, ending the effect on itself on a success. Once the effect ends for a creature, it is immune to Ophelia's Lightbringer's Presence for the next 24 hours.

In addition, all light sources within 120 feet of Ophelia, such as torches or braziers, light up with sacred, eternal flames and are cleansed of any corruption. Each creature of Ophelia's choice within 30 feet of such a light source is considered blessed.

Sunfire Nova (1/day). Ophelia utters sacred words as first the sky, and then the world itself is set ablaze in an inferno of holy fire. Each creature within 120 foot of Ophelia must make a DC 27 Constitution saving throw, taking 72 (16d8) fire damage and 72 (16d8) radiant damage on a failure or half as much on a success. In addition, a creature is blinded until cured by lesser restoration or similar magic on a failed saving throw.

Moreover, any magical darkness in the area is dispelled and up to six Blades of Radiance manifest from the radiant blaze in locations of Ophelia's choice.

Even once the initial fire storm has died down, the sky continues to  blaze for one minute. While the sky is on fire, magical darkness cannot be created in the area by any means, Ophelia's Radiant Blades deal an additional 2d8 fire damage, and at the end of each of Ophelia's turns she can choose three locations on the ground within 120 feet of her. 10-foot radius lances or pillars of sunlight and fire start descending upon those locations. Any creature that is within the area of such a pillar at the start of Ophelia's next turn takes 4d8 radiant and 4d8 fire damage.

Radiant Blades. Melee Spell Attack: +19 to hit, reach 10 ft., one target. Hit: 18 (4d8) radiant damage. Ophelia manifests a radiant sword from a ray of sunlight in an unoccupied space within 60 feet of her. She then can move all Radiant Blades summoned by her up to 30 feet and make an attack with each of them.
Ophelia can have up to six Radiant Blades under her control at any given time. Once she reaches that limit, summoning a new blade causes another one of her choice to disappear. A Radiant Blade can be destroyed by dealing damage to it. It has 50 HP, an AC of 20, immunity to all conditions as well as to radiant, fire and psychic damage, and if it is forced to make a saving throw, it uses Ophelia's bonuses.

Ophelia can take three reactions per round, although only one per turn.

Blade of Retaliation. When Ophelia takes damage, she can use her reaction to summon a Radiant Blade within 10 feet of the creature that dealt the damage and make an attack with the newly summoned blade.

Divine Abjuration. If Ophelia sees a fiend or undead within 120 feet of her casting a spell, she can force that creature to make a DC 27 Wisdom saving throw. On a failure, its spell fails and it takes 1d8 radiant damage per level of the spell it attempted to cast.

Parry. Ophelia adds +8 to her AC against one attack that would hit her. To do so, she must see the attacker and must be wielding a weapon.

Ophelia can take 3 legendary actions, choosing from the options below. Only one legendary action option can be used at a time and only at the end of another creature's turn. Ophelia regains spent legendary actions at the start of her turn.

Attack. Ophelia makes an attack.

Cleansing Touch. Ophelia uses her Healing Touch on a creature friendly to her or touches it and ends one spell of his choice that is affecting it.

Cast a Spell. Ophelia casts one of her spells.

Fiery Step. Ophelia magically teleports, along with any equipment she is wearing or carrying, up to 120 feet to an unoccupied space she can see. Any creature of her choice within 10 feet of the target square must make a DC 27 Dexterity saving throw, taking 18 (4d8) fire damage on a failure or half as much on a success.

Blazing Glory (Costs 2 Actions). Ophelia shrouds herself with the flames of the sun. Each creature of her choice within 30 feet of her must make a DC 27 Dexterity saving throw, taking 18 (4d8) fire damage plus 18 (4d8) radiant damage on a failed save, or half as much damage on a successful one. In addition, a creature is blinded until cured by lesser restoration or similar magic on a failed saving throw.

Radiant Assault (Costs 2 Actions). Ophelia commands all Radiant Blades she has summoned to move up to 60 feet and makes one attack with each of them.