You Stand at the Pinnacle of All You are called on as the ultimate solution, that challenge is not to be declined
Without Doubt You hold yourself without question as the suns chosen bastion., You cannot be threatened
You are the Champion 0f The Sun You bear the lion sin of pride so it will pour from you and roll over darkness.

Level 3: Sin of pride Spells

The magic of your oath ensures you always have certain spells ready; when you reach a Paladin level specified in the Oath of Devotion Spells table, you thereafter always have the listed spells prepared.

Sin Of Pride Spells

Paladin Level	Spells
3	hellish rebuke, inflict wounds, fire bolt, control flames
5	flaming sphere,  enlarge/reduce
9	fireball, daylight
13	fire shield, wall of fire
17	fire storm, Flame Strike

Level 3: Sacred Weapon

When you take the Attack action, you can expend one use of your Channel Divinity to imbue one Melee weapon that you are holding with positive energy. For 10 minutes or until you use this feature again, you add your Charisma modifier to attack rolls you make with that weapon (minimum bonus of +1), and each time you hit with it, you cause it to deal its normal damage type or Radiant damage.

The weapon also emits Bright Light in a 20-foot radius and Dim Light 20 feet beyond that.

You can end this effect early (no action required). This effect also ends if you aren’t carrying the weapon.

Level 7: Aura of pride

You and friendly creatures within 10 feet of you have resistance to radiant and fire damage. Additionally if you are in bright light you gain additional radiant damage on your melee attacks equal to your proficiency bonus. At level 18 this radius increases to 30 feet.

Level 15: Suns spirit

Your radiant vigor overflows and you
will not fall You regain hit points cqual to 1d6+half your paladin level if you end your turn with less than half of your hitpoints remaining and you arent incapcitated

Level 20: Radiant Harbinger

At 20th level you ascend to the Ruler of the Sun. As an action you can magically become an Avatar of the sun ULTIMATE ESCANOR.

gaining the following benefits for one minute.

You have resistance to all damage.
When you take the attack action on your turn you can make one additional attack as part of the action. Your attacks do max damage, immunities against you become resistances and resistances are nullified.
Once you use this feature it cant be used again until you. finish 7 long rests(or a week passes) or once when you would be incapacitated but are instantly knocked and MUST pass death saving throws, once up you cant make more than 1 attack for 1 turn