Oath of the Bloody Flame

By deciding to follow the path of fire and blood. You have decided to become the judge of Oath of Bloody Flame.
You will have benefits on fire/necrotic damage attacks, abilities and spells.

Oath Spells

You gain oath spells at the paladin levels listed in the Oath of the Bloody Flame spells table. See the Sacred Oath class feature for how oath spells work.

Oath of the Bloody Flame Spells

Paladin Level	Spells
3rd	inflict wounds
7th	vampiric touch
9th	fireball
13th	fire shield
17th	flame strike

Smite of Bloody Flame

From now on, your divine smite's damage type is necrotic damage or fire damage. You will choose the damage type whenever you use it.

Channel Divinity

When you take this oath at 3rd level, you gain the following two Channel Divinity options.

Bloody Flame Surround Us !. As a bonus action you create a bloody flame that surrounds you and the area for 5 ft. in all directions, following as you move. You and all creatures within 5 ft. takes fire damage and necrotic damage. This Bloody Flame lasts 1 minutes, spreads around corners, and cannot be dispersed unless you choose to end it.

Bloody Flame Grant Me Strength !. As a bonus action, you channel the powerful might of the Bloody Flame to bolster your attacks for 1 minute. Once per turn for the duration, when you hit a creature with a weapon attack the target takes fire damage and necrotic damage. 

 

Aura of Sustained Flame and Blood

Starting at 7th level, you fill nearby creatures with the Sustained Flame. While you’re not incapacitated, you and creatures of your choice within 10 feet of you gains a fire damage buff. When you or nearby creature you choice within 10 feet hits a target with necrotic damage they can use reaction for make a extra fire attack that hits same amount of necrotic damage as a fire damage.

Starting at 7th level, you fill nearby creatures with the Sustained Blood. While you’re not incapacitated, you and creatures of your choice within 10 feet of you gains a necrotic damage buff. When you or nearby creature you choice within 10 feet hits a target with fire damage they can use reaction for make a extra necrotic attack that hits same amount of fire damage as a necrotic damage.

These bonuses dont work with eachother.

When you reach 18th level in this class, the aura affects creatures within 30 feet of you.

The Blood Comes From The Flame

Starting at 15th level, whenever you make a fire attack, ability or spell you will gain temporary hit point for half of the damage. This temporary hit points can stack with any other similar effects and each stack last for 3 turns.

The Flame Comes From The Blood

Starting at 15th level, whenever you make a necrotic attack, ability or spell you will gain temporary hit point for half of the damage. This temporary hit points can stack with any other similar effects and each stack last for 3 turns.

Lay On Bloody Flame

Starting at 20th level, you can use Lay on Hands on hostile creature that you target. if you use it on a hostile creature it will reduce its maximum hit point instead of healing it.
You will also be considered as have advantage if you use an attack, ability, or spell that deals fire damage or necrotic damage against an hostile creature with reduced maximum hit point from lay on hands. Duration for this advantage is 1 turn per 10 hit point of lay on hand pool(Maximum of 10 turns.).